WWII’s Weirdest Facts The Soviet Union developed a flying tank called the Antonov A-40. True False None The Battle of Castle Itter involved American and German forces fighting together. True False None Germany planned to invade Britain using a fleet of amphibious tanks. True False None The Japanese used balloons to bomb the United States during WW2. True False None The German Tiger tank could fly short distances using jet engines. True False None Time's up Most Popular Most Popular