page_title: No. 617 Squadron RAF
section_title: Second World War
hierarchical_section_title: No. 617 Squadron RAF / History / Second World War
caption_attribution_description: English: Royal Air Force Bomber Command, 1942-1945. Wing Commander J B Tait, Commanding Officer of No. 617 Squadron RAF (fifth from left), standing with his crew by the tail of their Avro Lancaster B Mark I (Special), EE146 'KC-D', at Woodhall Spa, Lincolnshire, on returning from Lossiemouth, the day after the successful raid on the German battleship TIRPITZ in Tromso Fjord, Norway, (Operation CATECHISM).
context_page_description: Number 617 Squadron is a Royal Air Force aircraft squadron, originally based at RAF Scampton in Lincolnshire and currently based at RAF Marham in Norfolk. It is commonly known as the "Dambusters", for its actions during Operation Chastise against German dams during the Second World War. In the early 21st century it operated the Panavia Tornado GR4 in the ground attack and reconnaissance role until being disbanded on 28 March 2014. The squadron reformed on 18 April 2018, and was equipped at RAF Marham in June 2018 with the Lockheed Martin F-35B Lightning, becoming the first squadron to be based in the UK with this advanced V/STOL type.
context_section_description: The squadron was formed under great secrecy at RAF Scampton during the Second World War on 21 March 1943. It included Royal Canadian Air Force, Royal Australian Air Force and Royal New Zealand Air Force personnel and was formed for the specific task of attacking three major dams that contributed water and power to the Ruhr industrial region in Germany: the Möhne, Eder and Sorpe. The plan was given the codename Operation Chastise and carried out on 17 May 1943. The squadron had to develop the tactics to deploy Barnes Wallis's "Bouncing bomb", and undertook some of its training over the dams of the Upper Derwent Valley in Derbyshire, as the towers on the dam walls were similar to those to be found on some of the target dams in Germany.
  The squadron's badge, approved by King George VI, depicts the bursting of a dam in commemoration of Chastise. The squadron's chosen motto was "Après moi le déluge" ("After me, the flood"), a humorous double entendre on a famous saying of Madame de Pompadour to King Louis XV, made on the loss at the Battle of Rossbach by the French. The original commander of No. 617 Squadron, Wing Commander Guy Gibson, was awarded the Victoria Cross for his part in the raid. Guy Gibson also owned a black Labrador named Nigger, who was the mascot of the squadron for some time. Nigger was run over and killed outside the base on the evening of the raid.
  After the raid, Gibson was withdrawn from flying (due to the high number of raids he had been on) and went on a publicity tour. George Holden became commanding officer (CO) in July, but he was shot down and killed on his fourth mission, Operation Garlic in September 1943, in an attack on the Dortmund-Ems Canal; he had four of Gibson's crew with him. H. B. "Mick" Martin took command temporarily, before Leonard Cheshire took over as CO. Cheshire developed and personally took part in the special target marking techniques required, which went far beyond the precision delivered by the standard Pathfinder units – by the end he was marking the targets from a Mustang fighter. He was also awarded the VC.
  On 15 July 1943, 12 aircraft of the squadron took off from Scampton to attack targets in Northern Italy. All aircraft attacked and proceeded to North Africa without loss. The targets were San Polo d'Enza and Arquata Scrivia power stations; it was hoped that the attacks would delay German troops who were travelling down into Italy on the electrified railway system to support the Italian front. The operation met little opposition but the targets were obscured by valley haze and were not destroyed. The 12 crews returned to Scampton on 25 July from North Africa after bombing Leghorn docks on the return journey. The raid on Leghorn Docks was not a great success, due to mist shrouding the target. On 29 July 1943 nine aircraft took off from Scampton to drop leaflets on Milan, Bologna, Genoa and Turin in Italy. All aircraft completed the mission and landed safely in Blida, North Africa.
  The UK Government considered using No. 617 Squadron to target the Italian leader Mussolini in July or August 1943. The British believed if Mussolini was killed it might take Italy out of the war. It would have been a flight carried out at extremely low level with the targets of Mussolini's headquarters and residence in Rome. Neither of these targets were within 1,500 yards of the Vatican, which the Allies had promised not to damage. However within two weeks of the plan being suggested, Mussolini was ousted by his opponents and replaced by Pietro Badoglio, leading to an armistice with the Allies in September.
  Throughout the rest of the war, the squadron continued in a specialist and precision-bombing role, including the use of the enormous "Tallboy" and "Grand Slam" ground-penetrating earthquake bombs, on targets such as concrete U-boat shelters and bridges. Several failed attempts were made on The Dortmund-Ems Canal in 1943 (Operation Garlic); it was finally breached with Tallboys in September 1944.
  In March 1945 the squadron used the Grand Slam bomb for the first time, against the Bielefeld viadu
caption: No. 617 Squadron Avro Lancaster B.I EE146 at RAF Woodhall Spa with her crew (including OC Wg. Cdr. J. B. Tait) the day after the successful attack against Tirpitz.
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