The 8-inch howitzer Marks VI, VII and VIII were a series of British artillery siege howitzers on mobile carriages of a new design introduced in World War I. They could fire an enormous, high-explosive, 90 kilogram shell up to a range of 11 kilometers. Howitzers were used to pound trenches or targets in the enemy's rear area. The trajectory of fire was very high, with the shell plunging downwards to deliver a devistating explosion. At the end of World War I on the Western Front Canada had two 6-gun batteries, Australia 1, Britain 37.