A number of A10s were part of the British Expeditionary Force (BEF) sent to France in the early stages of World War II. The A10's cross country performance was recorded as poor, due to narrow, easily thrown tracks, but material losses incurred in the aftermath of Operation Dynamo (the evacuation of the BEF from Dunkirk in late May 1940) meant they could not be withdrawn from front line service quickly and so saw combat in small numbers in North Africa, where reliability and suspension performance in the desert conditions was praised. Sixty worn out examples were also taken to Greece by the 3rd Royal Tank Regiment and although they performed well against the German tanks, over 90% were lost due to mechanical breakdowns as opposed to enemy action (mainly through broken tracks).