 The ships'main armament was composed of twelve 340mm / 45 Modèle 1912 guns in three quadruple turrets, the same as in the contemporary French battleships of the Normandie class. One turret was placed forward, and the other two were placed in a superfiring pair, all on the centerline. The guns had a range of 16,000 m (17,000 yd) and had a rate of fire of two rounds per minute. The shells were 540-kilogram (1,190 lb) armor-piercing rounds and were fired with a muzzle velocity of 800 meters per second (2,600 ft / s). A secondary battery of twenty-four 138.6 mm / 55 Modèle 1910 guns mounted in casemates was planned for defense against torpedo boats. These guns fired a 36.5 kg (80 lb) shell at a muzzle velocity of 830 m / s (2,700 ft / s). The armament was rounded out by six torpedo tubes of undetermined diameter, all submerged in the ships' hulls.
