Question:  Which attack resulted with the formal surrender of German forces, the Battle of Guam or the Spring 1945 offensive in Italy?

Passages:
The Rhodesian Armoured Corps—the "Black Devils"—was the only standing armoured battalion of the Rhodesian Security Forces.  During World War II, it took part in the Allied Spring 1945 offensive and the Battle of Monte Cassino as part of South Africa's 6th Armoured Division.  The unit was among the first to enter a liberated Florence in July 1944.  Prior to 1963, its crews were trained in the United Kingdom or Aden Colony and were known as the "Selous Scouts" under the Federation of Rhodesia and Nyasaland.  After Rhodesia's Unilateral Declaration of Independence, maintaining the armoured vehicle fleet became a responsibility of the Rhodesian Light Infantry until Major Bruce Rooken-Smith reactivated the former "Rhodesian Armoured Car Regiment" in 1972.  During the Rhodesian Bush War, the regiment fought in several major campaigns and battles, particularly Operation Miracle in September 1979.  It was superseded by the new "Zimbabwe Armoured Corps" between 1980 and 1981. The Battle of the Argenta Gap was an engagement which formed part of the Allied spring 1945 offensive during the Italian Campaign in the final stages of the Second World War.  It took place in northern Italy from 12–19 April 1945 between troops of British V Corps commanded by Lieutenant-General Charles Keightley and German units of LXXVI Panzer Corps commanded by Lieutenant General ("General der Panzertruppe") Gerhard von Schwerin. The occupation of the Baltic states was the military occupation of the three Baltic states—Estonia, Latvia and Lithuania—by the Soviet Union under the auspices of the Molotov–Ribbentrop Pact on 14 June 1940 followed by their incorporation into the USSR as constituent republics, unrecognised by most Western powers.  On 22 June 1941 Nazi Germany attacked the USSR and within weeks occupied the Baltic territories.  In July 1941, the Baltic territory was incorporated into the "Reichskommissariat Ostland" of the Third Reich.  As a result of the Baltic Offensive of 1944, the Soviet Union recaptured most of the Baltic states and trapped the remaining German forces in the Courland pocket until their formal surrender in May 1945.  The Soviet "annexation occupation" ("Annexionsbesetzung " or occupation "sui generis") of the Baltic states lasted until August 1991, when the Baltic states regained independence. The Second Battle of Guam (21 July – 10 August 1944) was the American recapture of the Japanese-held island of Guam, a U.S. territory in the Mariana Islands captured by the Japanese from the U.S. in the 1941 First Battle of Guam during the Pacific campaign of World War II. The LXXVI Panzer Corps ("LXXVI Panzerkorps", 76th Armoured Corps) was a panzer corps of Nazi Germany during World War II.  The headquarters were formed in France under Army Group D on 29 June 1943 as LXXVI Army Corps but renamed a month later.  In August it shipped to Italy to become part of 10th Army.  It spent the rest of the war in Italy fighting in the Italian Campaign mainly under 10th Army but with short periods from February 1944 (Battle of Anzio) and January 1945 (Spring 1945 offensive in Italy) under 14th Army.  The Corps was commanded for most of its active fighting by General Traugott Herr. Operation Grapeshot order of battle is a listing of the significant formations that were involved in the Spring 1945 offensive in the Apennine Mountains and the Po valley in northern Italy, April 1945 – May 1945. The Raid on Scarborough, Hartlepool and Whitby on 16 December 1914, was an attack by the Imperial German Navy on the British ports of Scarborough, Hartlepool, West Hartlepool and Whitby.  The attack resulted in 592 casualties, many of them civilians, of which 137 were fatal.  The attack resulted in public outrage towards the German navy for an attack against civilians and against the Royal Navy for its failure to prevent the raid. Operation Roast was a military operation undertaken by British Commandos, at Comacchio lagoon in north-east Italy, during the Spring 1945 offensive in Italy, part of the Italian Campaign, during the final stages of Second World War. The Spring 1945 offensive in Italy, codenamed Operation Grapeshot, was the final Allied attack during the Italian Campaign in the final stages of the Second World War.  The attack into the Lombardy Plain by the 15th Allied Army Group started on 6 April 1945, ending on 2 May with the formal surrender of German forces in Italy. The Battle of Bologna was fought in Bologna, Italy from 9–21 April 1945 during the Second World War, as part of the Spring 1945 offensive in Italy.  The Allied forces were victorious, with the Polish II Corps and supporting Allied units capturing the city on 21 April.

Supporting sentences:
The Spring 1945 offensive in Italy, codenamed Operation Grapeshot, was the final Allied attack during the Italian Campaign in the final stages of the Second World War.  The attack into the Lombardy Plain by the 15th Allied Army Group started on 6 April 1945, ending on 2 May with the formal surrender of German forces in Italy.