Siena Donor: Vallely, M.L.S., John R. World War, 1939-1945 History 21 Tank warfare 14 Tanks (Military science) 14 Aerial operations, German 13 Aerial operations, American 10 more ... Aerial operations 8 Airplanes, Military 8 Equipment and supplies 7 Armed Forces 6 Armored vehicles, Military 5 Campaigns 5 Fighter planes 5 Fighter pilots 4 Aeronautics, Military 3 Bombers 3 Focke-Wulf Fw 190 (Fighter plane) 3 Military uniforms 3 Aerial operations, British 2 Artillery operations 2 Design and construction 2 Equipment 2 Infantry drill and tactics 2 T-34 (Tank) 2 Weapons systems 2 World War, 1914-1918 2 Aerial operations, Italian 1 Aerial operations, Japanese 1 Aerial operations, Soviet 1 less ...