Most World War I belligerents, including Austria-Hungary and Germany, experienced severe copper shortages because of insufficient domestic ore deposits and the extensive use of the copper alloys, brass and bronze, in the munitions industry. Both Germany and the Dual Monarchy, their foreign sources of copper limited because of the British blockade, were forced to use substitute metals and to curtail the use of copper even in the armaments industry. In 1913 Austria-Hungary's domestic production amounted to only 4,052 tons of pure copper. Austrian industrial demands were met only with the importation of 36,500 tons of the metal. Consequently, when the Allied blockade cut off most of her copper imports at the same time that military needs sharply increased demand, Austria-Hungary faced a dilemma. Moreover, before Austria-Hungary was able to develop substitutes for copper, brass, and bronze, domestic supplies had been seriously reduced.