The Yak-1 entered Soviet service in 1941, one of three modern types of aircraft accepted for production just prior to the German invasion of the USSR. Despite initial shortcomings, it soon proved to be the thoroughbred of the Soviet Airforce. Indeed, it remained in production until the end of the war, modernized but fundamentally recognizable. By VE-day about 33,100 Yakovlev fighters had been built. Virtually all Soviet fighter regiments flew at least...