During Operation Dynamo (the evacuation from Dunkirk of British, French and Belgian troops cut off by the German army during the Battle of Dunkirk), the Hawker Hurricanes operated from British bases. Between 26 May and 3 June 1940, the 14 Hurricane units involved were credited with 108 air victories. A total of 27 Hurricane pilots became aces during Operation Dynamo, led by Canadian Pilot Officer W. L. Willie McKnight (10 victories) and Pilot Officer Percival Stanley Turner (seven victories), who served in No. 242 Squadron, consisting mostly of Canadian personnel. Losses were 22 pilots killed and three captured.