Allied invasion of Italy - wikipedia Allied invasion of Italy Invasion of Italy Part of the Italian Campaign of World War II Troops and vehicles being landed under shell fire during the invasion of mainland Italy at Salerno, September 1943. Date 3 -- 17 September 1943 Location Salerno, Calabria and Taranto, Italy Result Allied victory Belligerents United Kingdom United States Canada Germany Italy ( to 8 September ) Commanders and leaders Dwight D. Eisenhower Harold Alexander Bernard Montgomery Mark W. Clark Albert Kesselring Heinrich von Vietinghoff Hans - Valentin Hube Strength 189,000 ( by 16 September ) 100,000 Casualties and losses 2,009 killed 7,050 wounded 3,501 missing 3,500 casualties ( incl. 630 killed ) Italian Campaign Invasion of Sicily Corkscrew Mincemeat Barclay Animals Chestnut Narcissus Fustian Ladbroke Gela Troina Centuripe Invasion of Italy Baytown Avalanche Slapstick Armistice with Italy Achse Naples Vatican bombing Volturno Line Barbara Line Bari raid Winter Line Bernhardt Line Monte la Difensa San Pietro Moro Ortona Rapido Monte Cassino Anzio Cisterna Diadem Strangle Trasimene Line Ancona Mediterranean Elba Gothic Line Rimini San Marino Gemmano Monte Castello Garfagnana 1945 Spring Offensive Bowler Roast Bologna Argenta Gap Herring Collecchio The Allied invasion of Italy was the Allied amphibious landing on mainland Italy that took place on 3 September 1943 during the early stages of the Italian Campaign of World War II. The operation was undertaken by General Sir Harold Alexander 's 15th Army Group ( comprising General Mark W. Clark 's Fifth Army and General Bernard Montgomery 's British Eighth Army ) and followed the successful invasion of Sicily. The main invasion force landed around Salerno on 9 September on the western coast in Operation Avalanche, while two supporting operations took place in Calabria ( Operation Baytown ) and Taranto ( Operation Slapstick ). Contents 1 Background 1.1 Allied plan 1.2 Axis defensive organization 2 Battle 2.1 Operations in southern Italy 2.2 Salerno landings 2.3 Luftwaffe response 2.4 Consolidation of the beachhead 2.5 German counterattacks 2.6 Eighth Army ordered to apply pressure 2.7 German withdrawal 2.8 Salerno mutiny 2.9 Further Allied advances 3 Aftermath 3.1 Clark 's award 4 See also 5 Footnotes 6 References 7 Further reading 8 External links Background Allied plan Map of the Invasion of Italy. Further information : Allied invasion of Italy order of battle Following the defeat of the Axis Powers in North Africa in May 1943, there was disagreement between the Allies as to what the next step should be. The British Prime Minister, Winston Churchill, in particular wanted to invade Italy, which in November 1942 he called `` the soft underbelly of the axis '' ( and General Mark W. Clark, in contrast, later called `` one tough gut '' ). Popular support in Italy for the war was declining, and he believed an invasion would remove Italy, and thus the influence of Axis forces in the Mediterranean Sea, opening it to Allied traffic. This would reduce the amount of shipping capacity needed to supply Allied forces in the Middle East and Far East at a time when the disposal of Allied shipping capacity was in crisis and increase British and American supplies to the Soviet Union. In addition, it would tie down German forces. Joseph Stalin, the Premier of the Soviet Union, had been pressing Churchill and Roosevelt to open a `` second front '' in Europe, which would lessen the German Army 's focus on the Eastern Front, where the bulk of its forces were fighting in the largest armed conflict in history against the Soviet Red Army. However the U.S. Army Chief of Staff, General George Marshall, and much of the American staff wanted to avoid operations that might delay an invasion of Europe, discussed and planned as early as 1942, which finally materialized as Operation Overlord in 1944. When it became clear that no cross-channel invasion of occupied France could be undertaken in 1943, it was agreed to invade Sicily, with no commitment made to any follow - up operations. However, both Churchill and Franklin D. Roosevelt, the U.S. President, accepted the necessity of Allied armies continuing to engage the Axis in the period after a successful campaign in Sicily and before the start of one in northwest Europe. The discussion continued through the Trident Conference in Washington in May but it was not until late July, after the course of the Sicilian campaign had become clear and with the fall of Benito Mussolini, the Italian Prime Minister and fascist leader, that the Joint Chiefs of Staff instructed General Dwight D. Eisenhower, the Supreme Allied Commander in the Mediterranean Theater of Operations ( MTO ), to go ahead at the earliest possible date. Joint Allied Forces Headquarters ( AFHQ ) were operationally responsible for all Allied land forces in the Mediterranean theatre, and it was they who planned and commanded the invasion of Sicily and the Italian mainland. The Allied invasion of Sicily in July 1943, codenamed Operation Husky, was highly successful, although many of the Axis forces managed to avoid capture and escape to the mainland. The Axis viewed this as a success. More importantly, in late July, a coup deposed Mussolini as head of the Italian government, which then began approaching the Allies to make peace. It was believed a quick invasion of Italy might hasten an Italian surrender and produce quick military victories over the German troops that could be trapped fighting in a hostile country. However, Italian ( and more so German ) resistance proved relatively strong, and fighting in Italy continued even after the fall of Berlin in April 1945. In addition, the invasion left the Allies in a position of supplying food and supplies to conquered territory, a burden which would otherwise have fallen on Germany. As well, Italy occupied by a hostile German army would have created additional problems for the German Commander - in - Chief ( C - in - C ), Generalfeldmarschall Albert Kesselring. Prior to Sicily, Allied plans envisioned crossing the Strait of Messina, a limited invasion in the `` instep '' area ( Taranto ), and advancing up the toe of Italy, anticipating a defense by both German and Italian forces. The overthrowing of Mussolini and the Fascisti made a more ambitious plan feasible, and the Allies decided to supplement the crossing of the British Eighth Army, under General Bernard Montgomery, with a seizure of the port of Naples. Although the Americans favored Napoleon 's maxim that Italy, like a boot, should be entered from the top, the range limits of Allied fighter planes based in Sicily reduced Allied choices to two landing areas : one at the Volturno River basin and the other at Salerno. Salerno was chosen because it was closer to air bases, experienced better surf conditions for landing, allowed transport ships to anchor closer to the beaches, had narrower beaches for the rapid construction of exit roads, and had an excellent pre-existing road network behind the beaches. Operation Baytown was the preliminary step in the plan in which the British Eighth Army would depart from the port of Messina on Sicily, to cross the Straits of Messina and land near the tip of Calabria ( the `` toe '' of Italy ), on 3 September 1943. The short distance from Sicily meant landing craft could launch from there directly, rather than be carried by ship. The British 5th Infantry Division ( Major - General Gerard Bucknall ) of XIII Corps, under Lieutenant - General Miles Dempsey, would land on the north side of the `` toe '' while its 1st Canadian Infantry Division ( Major - General Guy Simonds ) would land at Cape Spartivento on the south side. Montgomery was strongly opposed to Operation Baytown. He predicted it would be a waste of effort since it assumed the Germans would give battle in Calabria ; if they failed to do so, the diversion would not work, and the only effect of the operation would be to place the Eighth Army 300 miles ( 480 km ) south of the main landing at Salerno. He was proved correct ; after Operation Baytown the British Eighth Army marched 300 miles north to the Salerno area against no opposition other than engineering obstacles. Salerno D - Day plan. Plans for the use of Allied airborne forces took several forms, all of which were cancelled. The initial plan to land glider - borne troops in the mountain passes of the Sorrento Peninsula above Salerno was abandoned 12 August. Six days later it was replaced by Operation Giant, in which two regiments of the U.S. 82nd Airborne Division ( Matthew Ridgway ) would seize and hold crossings over the Volturno River. This was at first expanded to include the entire division, including an amphibious landing by the 325th Glider Infantry Regiment, then deemed logistically unsupportable and reduced to a two - battalion drop at Capua to block the highway there. The Italian surrender on 3 September cancelled Operation Giant I and replaced it with Operation Giant II, a drop of the 504th Parachute Infantry Regiment on Stazione di Furbara and Cerveteri airfields, 25 miles ( 40 km ) northwest of Rome, to aid Italian forces in saving Rome, possibly the most historically important city in the world, from German razing, a condition of the Italian armistice. Because the distance from the Allied beachheads precluded any substantial Allied support of the airborne troops, Brigadier General Maxwell D. Taylor, the acting assistant division commander ( ADC ) of the 82nd Airborne Division, was spirited into Rome to assess the willingness of Italian troops to cooperate with the Americans. Taylor 's judgment was that the operation would be a trap and he advised cancellation, which occurred late on the afternoon of 8 September after pathfinders had already taken off aboard their troop carrier aircraft. The main landings ( Operation Avalanche ) were scheduled to take place on 9 September, during which the main force would land around Salerno on the western coast. It would consist of the U.S. Fifth Army, under Lieutenant General Mark W. Clark, comprising the U.S. VI Corps under Major General Ernest J. Dawley, the British X Corps under Lieutenant - General Richard McCreery, with the 82nd Airborne Division in reserve, a total of eight divisions and two brigade - sized units. Its primary objectives were to seize the port of Naples to ensure resupply, and to cut across to the east coast, trapping Axis troops further south. The naval task force of warships, merchant ships and landing craft totaling 627 vessels came under the command of Vice Admiral Henry K. Hewitt. Following the disappointing air cover from land - based aircraft during the Sicily landings, Force V of HMS Unicorn and four escort carriers augmented the cruisers USS Philadelphia, Savannah, Boise, and fourteen destroyers of Hewitt 's command. Cover for the task force was provided by Force H, a group of four British battleships and two fleet carriers with destroyers in support, which was directly subordinate to the C -- in -- C Mediterranean Admiral of the Fleet Sir Andrew Cunningham. Men of the 2nd Battalion, Northamptonshire Regiment, part of 17th Brigade of British 5th Division, wait to board landing craft at Catania, Sicily, for the invasion of Italy, 2 September 1943. In the original planning, the great attraction of capturing the important port of Taranto in the `` heel '' of Italy had been evident and an assault had been considered but rejected because of the very strong defenses there. However, with the signing of the armistice with the Italians on 3 September the picture changed. It was decided to carry the British 1st Airborne Division ( Major - General George F. Hopkinson ) to Taranto using British warships, seize the port and several nearby airfields and follow up by shipping in Lieutenant - General Charles Allfrey 's British V Corps and a number of fighter squadrons. The airborne division, which was undergoing training exercises in two locations 640 kilometres ( 400 mi ) apart, was ordered on 4 September to embark on 8 September. With such short notice to create plans, Operation Slapstick was soon nicknamed Operation Bedlam. The Avalanche plan using less than half the troops landed during Operation Husky was daring, considering possible resistance by six German divisions. The Fifth Army would be landing on a very broad 56 km ( 35 mi ) front, using only three assault divisions ( one American, the 36th, under Major General Fred L. Walker, in VI Corps, and two British, the 46th, under Major - General John Hawkesworth, and 56th, under Major - General Douglas Graham, in X Corps ), and the two corps were widely separated, both in distance ( 19 km ( 12 mi ) ) and by the Sele River. Clark initially provided no troops to cover the river, offering the Germans an easy route to attack, and only belatedly landed two battalions to protect it. Furthermore, the terrain was highly favorable to the defender. Planning for the Salerno phase was accomplished in only forty - five days, rather than the months that might be expected. A U.S. Army Ranger force, under the command of Lieutenant Colonel William O. Darby, consisting of three U.S. Ranger battalions ( the 1st, 3rd and 4th ) and two British Commando units, under Brigadier Robert Laycock ( consisting of No. 2 ( Army ) Commando and No. 41 ( Royal Marine ) Commando ) was tasked with holding the mountain passes leading to Naples, but no plan existed for linking the Ranger force up with X Corps ' follow - up units. Finally, although tactical surprise was unlikely, Clark ordered no naval preparatory bombardment or naval gunfire support take place, despite experience in the Pacific Theater demonstrating it was necessary. ( Major General Walker, commanding the U.S. 36th `` Arrowhead '' Division, believed the defenders, from Traugott Herr 's LXXVI Panzer Corps, were too scattered for it to be effective. ) The element of surprise was further limited by belated discovery of naval minefields off Salerno requiring landing craft to spend two hours traveling 19 km ( 12 mi ) from the transports to the landing beaches. On the German side, Albrecht von Kesselring lacked the strength to push the Salerno landing back, and was refused two panzer divisions from northern Italy to assist him. Operation Avalanche was planned under the name Top Hat and supported by a deception plan, Operation Boardman, a false threat of an Allied invasion of the Balkans. Axis defensive organization In mid-August, the Germans had activated Army Group B ( Heeresgruppe B) under Erwin Rommel with responsibility for German troops in Italy as far south as Pisa. Army Command South ( OB Süd ) under Albert Kesselring continued to be responsible for southern Italy and the German High Command formed a new army headquarters to be Army Command South 's main field formation. The new German 10th Army ( 10. Armee ) headquarters, commanded by Heinrich von Vietinghoff, was activated on 22 August. The German 10th Army had two subordinate corps with a total of six divisions which were positioned to cover possible landing sites. Under Hermann Balck 's XIV Panzer Corps ( XIV Panzerkorps ) was the Hermann Göring Panzer Division ( Fallschirm - Panzer Division 1 Hermann Göring, under Wilhelm Schmalz ), 15th Panzergrenadier Division ( 15. Panzergrenadier - Division, Eberhard Rodt ) and 16th Panzer Division ( 16. Panzer - Division, Rudolf Sieckenius ) ; and under Traugott Herr 's LXXVI Panzer Corps ( LXXVI Panzerkorps ) was 26th Panzer Division ( 26. Panzer - Division, Heinrich Freiherr von Luttwitz ), 29th Panzergrenadier Division ( 29. Panzergrenadier - Division, Walter Fries ) and 1st Parachute Division ( 1. Fallschirmjäger - Division, Fritz - Hubert Graser ). Von Vietinghoff specifically positioned the 16th Panzer Division in the hills above the Salerno plain. Battle Operations in southern Italy Lieutenant General Mark Clark on board USS Ancon during the landings at Salerno, Italy, 12 September 1943. On 3 September 1943, the British Eighth Army 's XIII Corps, commanded by Lieutenant - General Miles Dempsey and composed of the 1st Canadian and British 5th Infantry Divisions, launched Operation Baytown under General Bernard Montgomery 's direction. Opposition to the landings was light and the Italian units surrendered almost immediately. Albert Kesselring and his staff did not believe the Calabria landings would be the main Allied point of attack, the Salerno region or possibly even north of Rome being more logical. He had already therefore ordered General Traugott Herr 's LXXVI Panzer Corps to pull back from engagement with the Eighth Army, leaving only 29th Panzergrenadier Division 's 15th Panzergrenadier Regiment in the ' toe ' of Italy. By 3 September, most of this unit was in prepared positions at Bagnara, some 40 km ( 25 mi ) from the landings which it had orders to hold until 6 September. After this they were to withdraw to join the rest of 29th Panzergrenadier Division which was concentrating at Castrovillari, some 130 km ( 80 mi ) to the rear. The Krüger Battle Group ( two battalions of 71st Panzergrenadier Regiment, 129th Reconnaissance Battalion and detachments of artillery and engineers ) under 26th Panzer Division, would then stand at Nicotera, roughly 24 km ( 15 mi ) up the coast from Bagnara. General Montgomery salutes his troops from a DUKW, Reggio, Italy, September 1943. On 4 September, the British 5th Infantry Division reached Bagnara Calabra, linked up with 1st Special Reconnaissance Squadron ( which arrived by sea ) and drove the 3rd Battalion, 15th Panzergrenadier Regiment from its position. On 7 September, contact was made with the Krüger Battle Group. On 8 September, the 231st Independent Brigade Group, under Brigadier Robert `` Roy '' Urquhart, was landed by sea at Pizzo Calabro, some 24 km ( 15 mi ) behind the Nicotera defenses. They found themselves attacked from the north by a mobile force from 26th Panzer Division and from the south by the Krüger Battle Group which was withdrawing from the Nicotera position. After an initial attack which made no headway, the Krüger Battle Group veered away but the northern attack continued throughout the day before the whole German force withdrew at dusk. Progress was slow as demolished bridges, roadblocks and mines delayed the Eighth Army. The nature of the countryside in the toe of Italy made it impossible to by - pass obstacles and so the Allies ' speed of advance was entirely dependent on the rate at which their engineers could clear obstructions. Thus, Montgomery 's objections to the operation were proved correct : the Eighth Army could not tie down German units that refused battle and the main obstacle to their advance was the terrain and German demolitions of roads and bridges. By 8 September, Kesselring had concentrated Heinrich von Vietinghoff 's 10th Army, ready to make a rapid response to any Allied landing. In Calabria, Herr 's LXXVI Panzer Corps had two divisions concentrated in the Castrovillari area. Its third division, 1st Parachute Division ( 1. Fallschirmjäger - Division ), was deployed toward Taranto. The rearguard in the toe was BattleGroup von Usedom, comprising a single battalion ( 1 / 67th Panzergrenadier Regiment ) with detachments of artillery and engineers. Meanwhile, Hube 's XIV Panzer Corps was positioned to face possible landings from the sea with 16th Panzer Division in the Gulf of Salerno, the Hermann Göring Division near Naples and the 15th Panzergrenadier Division to the north in the Gulf of Gaeta. On 8 September ( before the main invasion ), the surrender of Italy to the Allies was announced, first by General Eisenhower, then in the Badoglio Proclamation by the Italian government. Italian units ceased combat and the Navy sailed to Allied ports to surrender. The German forces in Italy were prepared for this and implemented Operation Achse to disarm Italian units and occupy important defensive positions. Operation Slapstick commenced on 9 September. The first echelon of the British 1st Airborne Division arrived on four British cruisers, a U.S. cruiser, and the British fast minelayer HMS Abdiel. The Italian battleships Andrea Doria and Caio Duilio with two cruisers passed by, en route to surrender in Malta. There were no Germans in Taranto and so disembarkation was unopposed. The only casualties occurred when Abdiel, at anchor, struck a mine and sank in minutes, with 168 killed and 126 injured. On 11 September, as patrols were sent further afield, there were some sharp encounters with elements of the German 1st Parachute Division. But 1st Parachute could do little but skirmish and fall back because most of its strength was attached to the 26th Panzer and Herman Göring Divisions at Salerno. Major - General George Frederick Hopkinson, General Officer Commanding ( GOC ) of the British 1st Airborne Division, was mortally wounded in one of these actions. By 11 September the ports of Bari and Brindisi, still under Italian control, were occupied. Salerno landings Main article : Operation Avalanche Operation Avalanche -- the main invasion at Salerno by the American Fifth Army under Lieutenant General Mark Clark -- began on 9 September 1943, and in order to secure surprise, it was decided to assault without preliminary naval or aerial bombardment. However, as Admiral Henry Hewitt, the amphibious force commander, had predicted, tactical surprise was not achieved. As the first wave of Major General Fred Walker 's U.S. 36th Infantry Division approached the Paestum shore at 03 : 30 a loudspeaker from the landing area proclaimed in English : `` Come on in and give up. We have you covered. '' The Allied troops attacked nonetheless. U.S. Navy tank landing craft offloads a U.S. Army jeep at Salerno. Major General Rudolf Sieckenius, commander of the 16th Panzer Division had organised his forces into four mixed arms battle groups which he had placed roughly 10 km ( 6 mi ) apart and between 5 and 10 km ( 3 and 6 mi ) back from the beaches. The Dőrnemann group was just east of Salerno ( and therefore were opposite Major General John Hawkesworth 's British 46th Infantry Division when it landed ), the Stempel battle group was between Pontecagnano and Battipaglia ( and so faced Major General Douglas Graham 's British 56th Infantry Division ), the Holtey battle group was in a reserve role at Persano on the Sele river which formed the corps boundary between Lieutenant General Richard McCreery 's British X Corps and Major General Ernest Dawley 's U.S. VI Corps, while the von Doering battle group responsible for the Albanella to Rutino sector was 6 km ( 4 mi ) south - east of Ogliastro, somewhat south of the U.S. 36th Division 's beaches. The British X Corps, composed of the British 46th and 56th Infantry Divisions and a light infantry force of U.S. Army Rangers and British Commandos of Brigadier Robert `` Lucky '' Laycock 's 2nd Special Service Brigade, experienced mixed reactions to its landings. The U.S. Rangers met no opposition and with support from the guns of HMS Ledbury seized their mountain pass objectives while the Commandos, from No. 2 ( Army ) Commando and No. 41 ( Royal Marine ) Commando, were also unopposed and secured the high ground on each side of the road through Molina Pass on the main route from Salerno to Naples. At first light units of No. 2 Commando moved towards Salerno and pushed back a small force of tanks and armoured cars from the 16th Panzer Reconnaissance Battalion. The British Commandos captured the town of Salerno after some serious fighting that cost 40 ( Royal Marine ) Commando and 41 Commando nine killed and thirty - seven wounded. Map of the Salerno beachhead at the end of 11 September 1943. The two British infantry divisions, however, met determined resistance and had to fight their way ashore with the help of naval bombardments. The depth and intensity of German resistance forced British commanders to concentrate their forces, rather than driving for a linkup with the Americans to the south. At Paestum, the two lead battalions of the 36th ( Texas ) Division ( from the 141st and 142nd Infantry Regiments ) received stiff resistance from two companies of the von Doering group. German observers on Monte Soprano directed fire onto the landing craft. LST 336 took 18 hits, and some LCTs and DUKWs sheered away to avoid German shellfire. The division had not been in combat before and as a result of the Italian surrender, there was a general belief amongst the soldiers that the landings would be routine. The 141st Infantry lost cohesion and failed to gain any depth during the day which made the landing of supporting arms and stores impossible, leaving them without artillery and anti-tank guns. However, the 142nd Infantry fared better and with the support of the 143rd Infantry, the reserve formation which had landed by 08 : 00, were able to push forward. Minesweepers cleared an inshore channel shortly after 09 : 00 ; so by late morning destroyers could steam within 91 m ( 100 yd ) of the shoreline to shell German positions on Monte Soprano. USS Philadelphia and Savannah focused their 15 cm ( 6 in ) guns on concentrations of German tanks, beginning a barrage of naval shells which would total eleven - thousand tons before the Salerno beachhead was secured. By the end of the first day the Fifth Army, although it had not gained all its objectives, had made a promising start : the British X Corps ' two assault divisions had pushed between 8 and 11 km ( 5 and 7 mi ) inland and the special forces had advanced north across the Sorrento Peninsula and were looking down on the Plain of Naples. To the south, the U.S. 36th Division had established itself in the plain to the right of the Sele river and the higher ground to a depth of 8 km ( 5 mi ), although the 141st Infantry was still stuck near the beach. However, the XIV Panzer Corps commander, Hermann Balck, had seen the 16th Panzer Division 's battle groups perform as intended and he had ordered both the Hermann Göring Division south to the battle and later in the day had been able to order 15th Panzergrenadier likewise. Meanwhile, to the south, the 29th Panzergrenadier Division from LXXVI Panzer Corps had also been directed to Salerno. Neither side had gained the initiative. Luftwaffe response Luftwaffe planes began strafing and bombing the invasion beaches shortly after 04 : 00 on the morning of 9 September before X Corps seized the Montecorvino airfield 5 km ( 3 mi ) inland later that day destroying three dozen German planes ; but failure to capture the high ground inland left the airfield within easy range of German artillery and therefore unusable by Allied aircraft. On 10 September German bombers began targeting Admiral Hewitt 's flagship USS Ancon while the ship was serving as General Clark 's headquarters. The flagship called thirty `` red alerts '' over a period of 36 hours in response to 450 Luftwaffe sorties. Admiral Hewitt reported : `` Air situation here critical. '' The aircraft carriers had intended to withdraw on 10 September, but remained with the invasion shipping so their Supermarine Seafires could provide the air cover invasion planners had expected to operate from Montecorvino. Eighty - five Allied vessels were hit by German bombs off Salerno. Fritz X glide bombs dropped by Dornier Do 217s disabled USS Savannah and narrowly missed USS Philadelphia on the morning of 11 September. The following morning Clark moved his headquarters ashore, and Hewitt transferred with his staff to the small amphibious force flagship USS Biscayne so the large Ancon with its conspicuous antenna array could retire to North Africa. Consolidation of the beachhead Men of the 2 / 6th Battalion, Queen 's Royal Regiment ( West Surrey ) advance past a pair of burning German PzKpfw IV tanks in the Salerno area, 22 September 1943. The Allies fought to expand their beachhead for three days while the Germans defended stubbornly to mask the build - up of their reinforcements for a counter-offensive. On 10 September, Clark visited the battlefield and judged that it was unlikely that X Corps would be able to push quickly east past Battipaglia to link with VI Corps. Since X Corps ' main line of thrust was to be north towards Naples, he decided to move the VI Corps left hand boundary north of the Sele river and move the bulk of Major General Troy Middleton 's U.S. 45th Division into the gap. In view of the enemy reinforcements approaching from the north he also ordered a battalion - sized mixed arms group to reinforce the Rangers the next day. Over the same period, German reinforcements filtered into the battlefield. Units, short of transport and subjected to other delays, arrived piecemeal and were formed into ad - hoc battle groups for immediate action. By 13 September, all the immediately available reinforcements had arrived including additional elements from the 3rd Panzergrenadier Division which had been released by Generalfeldmarschall Kesselring from further north near Rome. By contrast, the Allied build - up was constrained by the limited transport available for the operation and the pre-determined schedule of the build - up based on how, during the planning phase, it had been anticipated the battle would develop. By 12 September, it had become clear that the Fifth Army had an acute shortage of infantry on the ground. On 12 September, General Sir Harold Alexander, the 15th Army Group commander, reported to General Sir Alan Brooke, the Chief of the Imperial General Staff ( CIGS ), in London : `` I am not satisfied with the situation at Avalanche. The build - up is slow and they are pinned down to a bridgehead which has not enough depth. Everything is being done to push follow - up units and material to them. I expect heavy German counter-attack to be imminent. '' By 12 September, X Corps had taken a defensive posture because every battalion was committed and there were no reserves available to form an attack. In the south, the 36th Division made some progress but towards midday a counterattack by elements of the 29th Panzergrenadier Division overran the 1st Battalion, 142nd Infantry Regiment. German counterattacks On 13 September, the Germans launched their counteroffensive. While the Herman Göring battle groups attacked the northern flank of the beachhead, the main attack was on the boundary between the two Allied Corps which ran roughly from Battipaglia to the sea, with the greatest weight due to fall on the VI Corps side On the morning of 13 September elements of Major General Walker 's 36th Division attacked and captured Altavilla in the high ground some 14 km ( 9 mi ) behind Paestum but a counterattack forced them to withdraw as darkness fell. During the afternoon, two German battlegroups, the Kleine Limburg and the Krüger had attacked Persano and overrun the 1st Battalion, 157th Infantry before crossing the Sele to engage the 2nd Battalion of the 143rd Infantry and virtually wipe it out. The battle groups continued their strike south and south - west until reaching the confluence of the Sele and its large tributary the Calore, where it was stopped by artillery firing over open sights, naval gunfire and a makeshift infantry position manned by artillerymen, drivers, cooks and clerks and anyone else that Major General Walker could scrape together. Clark 's staff formulated various evacuation plans : Operation Brass Rail envisioned Clark and his 5th Army headquarters staff leaving the beachhead to establish headquarters afloat aboard HMS Hilary. Operation Sealion envisioned shifting British X Corps to Paestum with VI Corps, while the alternative Operation Seatrain envisioned shifting VI Corps to the X Corps sector. The navy protested that reversing the landing process would be impossible, since loading beached landing craft would make them heavier and unable to withdraw from the beach. Advice from superiors and subordinates convinced Clark to continue fighting, and he later denied seriously considering evacuation. Generalfeldmarschall Albert Kesselring, Commander of the German forces in Italy. The U.S. VI Corps had by this time lost the best part of three battalions and so the forward units of both its divisions were withdrawn to reduce the length of the defensive line. The 45th Division consolidated at the Sele - Calore position while the 36th Division was on the high ground on the seaward side of the La Caso stream ( which flowed into the Calore ). The new perimeter was held with the assistance of Major General Matthew Ridgway 's 82nd Airborne Division. Two battalions ( roughly 1,300 paratroopers ) of Colonel Reuben Tucker 's 504th Parachute Infantry Regiment ( PIR ), after the cancellation of Giant II, had been assigned to execute the final version of Operation Giant I at Capua on the evening of 13 September. Instead they jumped inside the beachhead, guided by Rebecca / Eureka beacons and moved immediately into the line on the right of VI Corps. The next night, with the crisis passed, 2,100 paratroops of Colonel James Gavin 's 505th PIR also parachuted into the beachhead and reinforced the two battalions of the 504th. A clear sign of the crisis passing was that when, on the afternoon of 14 September, the final unit of 45th Division, the 180th Infantry Regiment, landed and Clark was able to place it in reserve rather than in the line. The 325th Glider Infantry Regiment, reinforced by the 3rd Battalion, 504th PIR, landed by sea on 15 September. A night drop of 600 paratroops of the 509th Parachute Infantry Battalion to disrupt German movements behind the lines in the vicinity of Avellino was widely dispersed and failed, incurring significant casualties. In the X Corps sector the lead elements of Major General George Erskine 's British 7th Armoured Division began to land, along with the 23rd Armoured Brigade. With strong naval gunfire support from the Royal Navy and well - served by Fifth Army 's artillery, the reinforced and reorganized infantry units defeated all German attempts on 14 September to find a weak spot in the lines. German losses, particularly in tanks, were severe. In addition, on 14 September and the following night Tedder ordered every available aircraft to support the Fifth Army, including the strategic bomber force. Over 1,000 tons of bombs were dropped during the daylight hours of that day. Men of the 5th Battalion, Hampshire Regiment manning a 3 - inch mortar at Salerno, 15 September 1943. On 15 September both the 16th Panzer and 29th Panzergrenadier Divisions went on the defensive, thus marking the end to the thrust towards Paestum. Further north the Schmalz group of the Hermann Göering Division achieved surprise, attacking the 128th ( Hampshire ) Brigade ( comprising three battalions, the 2nd, 1 / 4th and 5th, of the Hampshire Regiment ), of the British 46th Division, on the high ground east of Salerno. The armoured column following up was intercepted and driven back leaving the German infantry exposed. The Allied bomber effort continued on 15 September, although slightly less intense than the previous day, as did the naval bombardment. The arrival of the British battleships HMS Warspite and Valiant, with 38 cm ( 15 in ) guns off the beaches provided the Allied troops with a morale boost, although Valiant was not required to shoot and Warspite 's 29 rounds fired were awe - inspiring but a minor contribution to the 2,592 naval rounds fired in total that day. On 15 September, Kesselring reported to the Oberkommando der Wehrmacht that the Allied air and naval superiority had forced LXXVI Panzer Corps onto the defensive and that a decisive success would depend on the current attack by XIV Panzer Corps. If this failed, the 10th Army must break off the battle to avoid being ' mangled '. On 16 September, the Schmalz group renewed its efforts on the X Corps front but with no more success, although No. 2 Commando suffered casualties, including 31 - year - old Captain Henry Wellesley, the then - Duke of Wellington, who was killed. The air force and navy continued to batter enemy targets, although during an air raid by Dornier Do 217 K - 2 bombers armed with Fritz X radio - controlled glide bombs, Warspite was hit and disabled which required her to be towed to Malta for repair. Eighth Army ordered to apply pressure On 9 September, Montgomery 's formations had been strung out along the coastal roads in the ' toe ' of Italy. The build - up across the Straits of Messina had proved slow and he was therefore short of transport. On 9 September, he decided to halt his formations in order to reorganise before pushing on but General Alexander replied on 10 September that `` It is of the utmost importance that you maintain pressure upon the Germans so that they can not remove forces from your front and concentrate them against Avalanche ''. This message was further reinforced on 12 September by a personal visit from Alexander 's Chief of Staff, Brigadier A.A. Richardson. Montgomery had no choice and while reorganising the main body of his troops sent light forces up the coast which reached Castrovillari and Belvedere on 12 September, still some 130 km ( 80 mi ) from the Salerno battlefield. On 14 September, he was in a position to start a more general advance, and by 16 September the British 5th Infantry Division had reached Sapri, 40 km ( 25 mi ) beyond Belvedere, where forward patrols made contact with patrols from VI Corps ' 36th Division. German withdrawal On 16 September, von Vietinghoff reported to Kesselring that the Allied air and naval superiority were decisive and that he had not the power to neutralize this. 10th Army had succeeded in preventing troops being cut off, and continuing the battle would just invite heavy losses. The approach of the Eighth Army was also now posing a threat. He recommended to break off the battle, pivoting on Salerno to form a defensive line, preparatory to commencing withdrawal on 18 / 19 September. Kesselring 's agreement reached von Vietinghoff early on 17 September. Salerno mutiny Main article : Salerno Mutiny The Salerno battle was also the site of the Salerno Mutiny instigated by about 500 men of the British X Corps, which had by this time suffered over 6,000 casualties, who, on 16 September, refused assignment to new units as battle casualty replacements. They had previously understood that they would be returning to their own units from which they had been separated during the fighting in the North African Campaign, mainly because they had been wounded. Eventually the corps commander, Lieutenant - General Richard McCreery, persuaded about half of the men to follow their orders. The remainder were court - martialled. Three NCOs who led the mutiny were sentenced to death but the sentence was not carried out and they were eventually allowed to rejoin units. Further Allied advances This section does not cite any sources. Please help improve this section by adding citations to reliable sources. Unsourced material may be challenged and removed. ( September 2017 ) Allied advance to the Volturno river. With the Salerno beachhead secure, the Fifth Army began its attack northwest towards Naples on 19 September. The day afterwards, Major General Ernest J. Dawley, the U.S. VI Corps commander, was relieved of his command by Clark and replaced by Major General John P. Lucas. The U.S. 82nd Airborne Division, after suffering serious casualties near Altavilla, was shifted to British X Corps, joining the U.S. Army Rangers and the British 23rd Armoured Brigade on the Sorrento Peninsula to flank the German defenses at Nocera Inferiore, Sant'Antonio Abate, and Angri, which the British 46th Infantry Division attacked. The British 7th Armoured Division, passing through the 46th Division, was assigned the task of taking Naples, while the newly landed U.S. 3rd Infantry Division took Acerno on 22 September and Avellino on 28 September. The Eighth Army made good progress from the `` toe '' in spite of German demolitions and linked with the British 1st Airborne Division at Taranto. Its left linked up with the Fifth Army 's right on 16 September. The Eighth Army now concentrated its forces east of the Apennine Mountains and pushed north along the Adriatic coast through Bari. On 27 September, the Eighth Army captured the large airfield complex near Foggia, a major Allied objective. German troops occupying Naples provoked a rebellion by the population, starting on 27 September, and had to evacuate. On 1 October, `` A '' Squadron of the 1st King 's Dragoon Guards, the armoured car regiment of X Corps, entered the city, the first Allied unit to do so. The entire Fifth Army, now consisting of five American and three British divisions, reached the line of the Volturno River on 6 October. This provided a natural defensive barrier, securing Naples, the Campanian plain and the vital airfields on it from German counterattack. Meanwhile, on the Adriatic Coast, the Eighth Army advanced to a line from Campobasso to Larino and Termoli on the Biferno river. Aftermath Daimler scout car of the 1st King 's Dragoon Guards at the town hall in Naples, 1 October 1943. The 10th Army had come close to defeating the Salerno beachhead. The stubborn initial resistance by 16th Panzer Division 's battlegroups and the Germans ' ability to reinforce them by land more quickly than the Allies could land follow - up forces by sea or air had almost tipped the battle. The Fifth Army planners had concentrated the main weight of its forces in X Corps on its left wing, in line with its major objective of advancing on Naples. This had left its right wing too thinly manned to defend X Corps ' right flank and left a particular weakness at the corps boundary. In the end, the Germans, aware of the limited time available to deal with the Salerno landings because of the inevitable arrival in due course of the Eighth Army, were obliged to make hurried and uncoordinated attempts to force a quick decision and had failed to break through Allied lines and exploit the gains in the face of total Allied air superiority and artillery and naval gunfire support. The Allies had been fortunate that at this time Adolf Hitler had sided with the view of his Army Group commander in Northern Italy, Generalfeldmarschall Erwin Rommel, and decided that defending Italy south of Rome was not a strategic priority. As a result, Kesselring had been forbidden to call upon reserves from the northern Army Group. The success of the 10th Army in inflicting heavy casualties, and Kesselring 's strategic arguments, led Hitler to agree that the Allies should be kept away from German borders and prevented from gaining the oil resources of the Balkans. On 6 November, Hitler withdrew Rommel to oversee the build - up of defenses in northern France and gave Kesselring command of the whole of Italy with a remit to keep Rome in German hands for as long as possible. By early October 1943, the whole of southern Italy was in Allied hands, and the Allied armies stood facing the Volturno Line, the first of a series of prepared defensive lines running across Italy from which the Germans chose to fight delaying actions, giving ground slowly and buying time to complete their preparation of the Winter Line, their strongest defensive line south of Rome. The next stage of the Italian Campaign became for the Allied armies a grinding and attritional slog against skillful, determined and well - prepared defenses in terrain and weather conditions which favoured defense and hampered the Allied advantages in mechanised equipment and air superiority. It took until mid-January 1944 to fight through the Volturno, Barbara and Bernhardt lines to reach the Gustav Line, the backbone of the Winter Line defenses, setting the scene for the four battles of Monte Cassino which took place between January and May 1944. Clark 's award Lieutenant General Mark W. Clark, the U.S. Fifth Army commander, was awarded the Distinguished Service Cross, the second - highest U.S. award for valor in combat, for his front - line leadership during this crisis. He was frequently seen in the most forward positions encouraging the troops. However, in the opinion of historian Carlo D'Este, Clark `` mistakenly believed he had saved the Allied invasion by his leadership, when in fact it was precisely his inexperience that precipitated most of the problems the invasion force faced. '' See also Allied invasion of Italy order of battle European Theatre of World War II Military history of Italy during World War II Footnotes ^ Jump up to : Atkinson p. 236 Jump up ^ Langworth 2008, p. 43. Jump up ^ Molony 2004, p. 2. Jump up ^ Leighton 2000, pp. 206 -- 218. Jump up ^ Molony, p. 186. Jump up ^ Molony, pp. 185 - 197. Jump up ^ Grigg, Jump up ^ The Italian peninsula resembles the shape of a high - heeled boot. The toe refers to the southwest tip of the peninsula, where the toe would be in the boot. Jump up ^ Atkinson p. 181 Jump up ^ `` The Pittsburgh Press - Google News Archive Search ''. Jump up ^ Reports surfaced that the Germans had mined the colliseum and in the event of defeat, an order would be given from the high command to destroy the city. Similar orders were given to German general Dietrich von Choltitz as Paris fell back into Allied hands, which he claims to have defied. ^ Jump up to : Molony, p. 261. Jump up ^ Atkinson p. 184 Jump up ^ Molony, p. 242. Jump up ^ Atkinson p. 185 Jump up ^ Terdoslavich, William. `` Nothing Goes Right in Italy '', in Fawcett, Bill, ed. How to Lose WWII ( New York : Harper, 2000 ), p. 157. ^ Jump up to : Terdoslavich, p. 157. Jump up ^ Atkinson pp. 184&204 Jump up ^ Molony, p. 210. Jump up ^ Molony, p. 212. Jump up ^ Molony, pp. 209 - 210. Jump up ^ Molony, p. 213. ^ Jump up to : Molony, p. 239. Jump up ^ Molony, p. 241. Jump up ^ Clark, p. 20. Jump up ^ Molony, p. 245. Jump up ^ Molony, p. 267. ^ Jump up to : Molony, p. 243. Jump up ^ Atkinson p. 204 Jump up ^ Potter & Nimitz pp. 595 - 598 Jump up ^ Molony, p. 268. ^ Jump up to : Molony, p. 280. Jump up ^ By Land and By Sea : The Story of the Royal Marine Commandos, Robin Neillands, p. 86, Pen and Sword, 2004 ^ Jump up to : Atkinson p. 205 Jump up ^ Molony, pp. 280 - 281. Jump up ^ Molony, p. 281. Jump up ^ Atkinson p. 207 Jump up ^ Molony, p. 276. Jump up ^ Atkinson p. 209 Jump up ^ Atkinson pp. 214&216 Jump up ^ Atkinson p. 213 Jump up ^ Atkinson p. 219 Jump up ^ Atkinson p. 217 Jump up ^ Atkinson pp. 219&227 Jump up ^ Molony, p. 289. Jump up ^ Molony, p. 293. Jump up ^ Molony, p. 294. Jump up ^ Molony, p. 304. Jump up ^ Molony, p. 299. Jump up ^ Molony, p. 300. Jump up ^ Molony, p. 308. Jump up ^ Molony, pp. 309 - 310. Jump up ^ Molony, p. 310. Jump up ^ Atkinson pp. 226&228 Jump up ^ Molony, p. 312. Jump up ^ Molony, p. 313. ^ Jump up to : Molony, p. 322. Jump up ^ Molony, p. 314. Jump up ^ Molony, p. 316. Jump up ^ Molony, pp. 316 - 317 / Jump up ^ Molony, 318. Jump up ^ Molony, p. 319. Jump up ^ Molony, p. 244. ^ Jump up to : Molony, p. 246. Jump up ^ Molony, p. 324. Jump up ^ Molony, p. 328. Jump up ^ Orgill, p. 5. Jump up ^ Mavrogordato, p. 321 Jump up ^ D'Este, p. 63. References This article incorporates public domain material from websites or documents of the United States Army Center of Military History. Atkinson, Rick ( 2007 ). The Day of Battle. Two. New York : Henry Holt and Company. ISBN 0 - 8050 - 6289 - 0. Churchill, Winston ; Langworth, Richard ( 2008 ). Churchill by Himself : The Definitive Collection of Quotations. New York : PublicAffairs. Clark, Lloyd ( 2006 ). Anzio : The Friction of War - Italy and the Battle for Rome 1944. Headline Publishing Group, London. ISBN 978 - 0 - 7553 - 1420 - 1. D'Este, Carlo ( 1991 ). Fatal Decision : Anzio and the Battle for Rome. ISBN 0 - 06 - 092148 - X. Fifth Army Historical Section ( 1990 ) ( 1944 ). Salerno : American Operations From the Beaches to the Volturno 9 September - 6 October 1943. American Forces in Action Series. Washington : United States Army Center of Military History. ISBN 0 - 16 - 001998 - 2. CMH Pub 100 - 7. Grigg, John ( 1982 ). 1943 : The Victory that Never Was. Kensington Pub Corp. ISBN 0 - 8217 - 1596 - 8. Leighton, Richard M. ( 2000 ) ( 1960 ). `` Chapter 8 : U.S. Merchant Shipping and the British Import Crisis ''. In Greenfield, Kent Roberts. Command Decisions. Washington : United States Army Center of Military History. CMH Pub 72 - 7. Mavrogordato, Ralph S. ( 2000 ) ( 1960 ). `` Chapter 12 : Hitler 's Decision on the Defense of Italy ''. In Greenfield, Kent Roberts. Command Decisions. Washington : United States Army Center of Military History. CMH Pub 72 - 7. Molony, Brigadier C.J.C. ; with Flynn, Captain F.C. ( R.N. ) ; Davies, Major - General H.L. & Gleave, Group Captain T.P. ( 2004 ) ( 1st. pub. HMSO : 1973 ). Butler, Sir James, ed. The Mediterranean and Middle East, Volume V : The Campaign in Sicily 1943 and The Campaign in Italy 3rd September 1943 to 31st March 1944. History of the Second World War, United Kingdom Military Series. Uckfield, UK : Naval & Military Press. ISBN 1 - 84574 - 069 - 6. Muhm, Gerhard ( 1993 ). La Tattica tedesca nella Campagna d'Italia, in Linea Gotica avanposto dei Balcani, ( Hrsg. ) ( in Italian ). Roma : Amedeo Montemaggi - Edizioni Civitas. Muhm, Gerhard. `` German Tactics in the Italian Campaign ''. Orgill, Douglas ( 1967 ). The Gothic Line ( The Autumn Campaign in Italy 1944 ). London : Heinemann. Potter, E.B. ; Nimitz, Chester W. ( 1960 ). Sea Power. Englewood Cliffs, New Jersey : Prentice - Hall. Smith, Col. Kenneth V. ( c. 1990 ). Naples - Foggia 9 September 1943 - 21 January 1944. The U.S. Army Campaigns of World War II Campaigns. Washington : United States Army Center of Military History. CMH Pub 72 - 17. Terdoslavich, William. `` Nothing Goes Right in Italy '', in Fawcett, Bill, ed. How to Lose WWII, pp. 156 -- 60. New York : Harper, 2000. Further reading Mavrogordato, Ralph S. ( 1960 ). `` 12 Hitler 's Decision on the Defense of Italy ''. In Kent Roberts Greenfield. Command Decisions ( 2000 reissue ed. ). United States Army Center of Military History. CMH Pub 70 - 7. External links Wikimedia Commons has media related to Operation Avalanche ( World War II ). `` Canada -- Italy : 1943 -- 1945 ''. Veterans Affairs Canada. Archived from the original on 27 March 2010. Retrieved 17 February 2010. `` Campaign Summaries of World War 2 : Italy and the Italian Campaign 1943 -- 1945, including Sicily, Salerno & Anzio Landings ''. Naval-History.net. 1998 -- 2010. Retrieved 17 February 2010. Winter Line Stories Original stories from the front lines of the Italian Campaign by US Army Liaison Officer Major Ralph R. 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Question: when did the us and britain invade italy
Answer: 3 September 1943