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TankA tank is a heavy, tracked, motor vehicle with a machine gun and a cannon, used in warfare. Tanks usually carry heavy armor, making them invulnerable to small arms fire and resistant to mines, rockets, and artillery. Tanks were invented during World War I as a way to break the stalemate of trench warfare. They came into their own when used en masse during World War II, and were a key component of Blitzkrieg. Over time they proved vulnerable to air attack and to isolation from their supporting infantry. |