War and Military Atlas

How Battles Were Fought
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Weapons Systems

Grand Slam

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The Grand Slam, formally the Bomb, Medium Capacity, 22,000 lb, was a 22,000-pound earthquake bomb designed by Barnes Wallis and used by RAF Bomber Command against German targets in the final months of World War II. Forty-two Grand Slams were dropped on Germany between 14 March and 19 April 1945, and the weapon stood as the largest conventional aerial bomb used in the war, a distinction it held until 1949.

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