During the April War in 1941, in 9 war days, 145 pilots died in air combats, while 576 members of the Air Force perished on ground. In that period 1416 combat flights were performed, downing 60 enemy aircraft. Especially, the 5th and 6th Fighter regiment pilots showed exceptionally their bravery, and also bombers pilots, causing significant casualties to the enemy at airbases in Austria, Hungary and Bulgaria.