DD tank
BRITISH WWII AMPHIBIOUS SWIMMING TANK
Dd tank; Dd-tank; Duplex drive tank; Sherman DD; Sherman Duplex Drive; Duplex Drive Sherman; DD Tank; Duplex Drive; DD Sherman; Duplex Drive tank; Amphibious DD tanks; Amphibious DD tank; Duplex drive; Floatation Screen; Donald Duck tank; Swimming Sherman
DD or Duplex Drive tanks, nicknamed "Donald Duck tanks", were a type of amphibious swimming tank developed by the British during the Second World War. The phrase is mostly used for the Duplex Drive variant of the M4 Sherman medium tank, that was used by the Western Allies during and after the Normandy Landings in June 1944.