. "tanks" . . . . "Armor" . . . "Tank" . "advances continued throughout the war" . . . "uses of armored vehicles" . . . . . "World War II Tanks" . "Tanks in World War II" . "tank battles" . "Tanks in World War II" . . . . "World War II tanks" . "tanks in World War II" . . . . "German tank theory" . "Tanks" . "designs of World War II" .