Messerschmitt Bf 109 109 was steadily being supplemented by the Focke-Wulf Fw 190. It was commonly called the Me 109, most often by Allied aircrew and even among the German aces themselves, even though this was not the official German designation. It was designed by Willy Messerschmitt and Robert Lusser, who worked at Bayerische Flugzeugwerke during the early to mid-1930s. Whilst the 109 was conceived as an interceptor, later models were developed to fulfill multiple tasks, serving as bomber escort, fighter-bomber, day-, night-, all-weather fighter, ground-attack aircraft, and as reconnaissance aircraft. It was supplied to and operated by several states during World War
Messerschmitt Bf 109 in Yugoslav service Air Training School, both based at Mostar. All of these aircraft were deployed in the fighter/interceptor role. Immediately prior to the German-led Axis invasion of Yugoslavia in April 1941, 64–65 of the original 73 Bf 109E-3s were serviceable. They were allocated as follows: Commencing at 06:45 on 6 April, the "Luftwaffe" launched Operation Retribution, a series of concerted bombing attacks on Belgrade that coincided with air and ground attacks throughout the country. Several waves of German aircraft approached Belgrade during the day, initially Junkers Ju 87 "Stuka" dive-bombers escorted by fighters. All of the Bf 109E-3s of the 51st Fighter