SM U-140 was a Type U 139 submarine that served in the Imperial German Navy in World War I. U-140 was engaged in naval warfare and took part in the First Battle of the Atlantic.
After the end of World War I, U-140 surrendered to the United States, which used her for testing. Finally, the United States Navy destroyer sank her as a target in the Atlantic Ocean off Cape Charles, Virginia, on 22 July 1921.
Summary of raiding history DateNameNationalityTonnageMerchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.Fate27 July 1918Porto1,079Sunk2 August 1918Tokuyama Maru7,029Sunk4 August 1918O. B. Jennings10,289Sunk5 August 1918Stanley M. Seaman1,060Sunk6 August 1918590Sunk6 August 1918Merak3,024Sunk21 August 1918Diomed7,523Sunk
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Bibliography Etzold, Dominic (2023). Reaping the Whirlwind: The U-Boat War off North America During WWI. Atglen: Schiffer Military History.