"The AC 47 was a French anti-tank gun of 47mm caliber. It was principally used in the ouvrages and casemates of the Maginot Line in the late 1930s; another version was created for naval use. The AC 47 was principally used as a defensive weapon, since its portability was intentionally limited to prevent the weapon from being turned on defending troops if a fortification was captured."@en . "France"@en . "World War II"@en . "Anti-tank"@en . "Naval"@en . "AC 47 of Block 1, Ouvrage Schoenenbourg in 1940"@en . . "France"@en . . . . "yes"@en . "47.0"^^ . . . . "AC 47"@en . "yes"@en . "AC 47 anti-tank gun"@en . "20"^^ . "The AC 47 was a French anti-tank gun of 47mm caliber. It was principally used in the ouvrages and casemates of the Maginot Line in the late 1930s; another version was created for naval use. The AC 47 was principally used as a defensive weapon, since its portability was intentionally limited to prevent the weapon from being turned on defending troops if a fortification was captured."@en . . . "40.0"^^ .