Summary Light fighters were the most mass-produced due to necessity, with all five on this list serving in WWII. Maneuverable fighters, including the Ilyushin Il-2 and the Messerschmitt Bf-109, were needed in large quantities. The Il-2 led to 36,183 units, an aircraft that would continue to be heavily modified throughout the war. Conflict forces nations to ramp up their aircraft production, as large-scale air battles require air forces to continue building up their inventory to maintain strength in the skies. As a result, it would be unsurprising to hear that the five most produced military aircraft of all time rolled...