The Weapons category is divided into four areas.
Modern Artillery: 2777 items including field guns, mortars, self-propelled guns, and missiles, from about 1880 to present.
Armored Vehicles: 1453 items including Tanks, APC's, Amphibious Tractors, and Armored Cars
Black-Powder weapons: 2471 items. The database covers cannon and mortars, including breech-loaders and muzzle-loaders up until the mid 1890's.
Naval Weapons: 84 items, does not include black-powder cannon nor ships guns mounted as coastal-defense artillery.
Corrections and comments are always appreciated.