Whippets arrived late in the First World War, at a time when the entire British Army, recovering from the offensives in Flanders, was quite inactive. They first went into action in March 1918, and proved very useful to cover the fighting withdrawal of the infantry divisions recoiling from the German onslaught during the Spring Offensive. Whippets were then assigned to the normal Tank Battalions as extra "X-companies". In one incident near Cachy, a single Whippet company of seven tanks wiped out two entire German infantry battalions caught in the open, killing over 400. That same day, 24 April, one Whippet was destroyed by a German A7V in the world's second tank battle, the only time a Whippet fought an enemy tank.