The Renault F.T. remained the most numerous tank in the world into the early 1930s. Aware of the need for more powerful vehicles, if only for leading infantry assaults, the French army took the lead in developing well-armed tanks. The original 1918 French Schneider and Saint-Chamond tanks already had 75-mm guns, while the heavier British tanks were at best armed with 57-mm guns. After the war the French built 10 68-ton 2C tanks with the first turret-mounted 75-mm guns and continued to develop 75-mm-gun tanks, notably the 30-ton Char B of 1936.