"Since the Great War was an artillery war, shells for field and medium guns stood at the top of the list. But that list also included motor transport, aircraft and aero-engines, small arms and ammunition, telecommunications kit, drugs, and later, tanks and poison gas. It was here that "the audit of war" (to coin a phrase) in 1914–1916 showed up the British industrial system as widely inadequate or obsolescent... To take the basic industrial sinew, British steel production in 1910 was little more than half the German total... According to the History of the Ministry of Munitions: "British manufacturers were behind other countries in research, plant and method. Many of the iron and steel firms were working on a small scale, old systems and uneconomic plant, their cost of production being so high that competition with the steel works of the United States and Germany was becoming impossible". In fact, this history draws the conclusion that in 1914–1916, "it was only the ability of the Allies to import shell and shell steel from neutral America...that averted the decisive victory of the enemy". More than 50 per cent of shells fired off in the Battle of the Somme in 1916 were American and Canadian."