Wüste oder Bef?

The War Office was initially deterred by the size of the turret, since they considered a turret crew of three necessary, to free the vehicle commander from direct involvement in operating the gun.[7] Concerned by the situation in Europe, it finally approved the design in April 1939 and placed the first order in July for deliveries in May 1940. At the start of the war, Vickers were instructed to give priority to the production of tanks.[8] The vehicle reached trials in May 1940, which coincided with the loss of much of the army's equipment in France, during Operation Dynamo, the evacuation from Dunkirk. The trials were successful and the vehicle was rushed into production as "Tank, Infantry, Mark III"; no pilot models were required as much of the mechanics had been proven on the A10 and it entered service from July 1941.