Artillery History 18 Ordnance 10 Periodicals 9 World War, 1939-1945 6 Arms and armour 3 Artillery, self-propelled 3 Antitank guns 2 Armored vehicles, Military 2 Artillery operations 2 Equipment and supplies 2 Handbooks, manuals, etc 2 Military weapons 2 Napoleonic Wars, 1800-1815 2 Periodical 2 Proximity fuzes 2 Rockets (Ordnance) 2 Vehicles, Military 2 World War, 1914-1918 2 Allied Forces 1 Anti-aircraft artillery 1 Antiair craft guns 1 Army 1 Artilery 1 Artillery operations, American 1 Artillery operations, German 1 Artillerymen 1 Biography 1 Campaigns 1 Catalogs 1