12-pounder gun or 12-pdr, usually denotes a gun which fired a projectile of approximately 12 pounds. Guns of this type include: * 12-pounder long gun, the naval muzzle-loader of the Age of Sail * Canon de 12 de Vallière, French cannon of 1732 * Canon de 12 Gribeauval, French field cannon of the mid-late 18th century * Canon lourd de 12 Gribeauval, French heavy cannon of the mid-late 18th century * Canon obusier de 12, French 12-pounder cannon-howitzer of 1853. Known in the US as "12 pounder Napoleon" * M1841 12-pounder howitzer, American howitzer having the same caliber (4.62 inches) as a 12-pounder field gun * One of the Dahlgren guns of the American Civil War * Ordnance BL 12 pounder 7 cwt, British field gun, 1885–1892 * Ordnance QF 12 pounder 8 cwt, British naval landing gun, l