The Messerschmitt Bf.109 was one of the first truly modern fighters of WW2. Originally conceived as an interceptor, the Bf.109 fulfilled multiple roles, as bomber escort, fighter-bomber, ground-attack aircraft, and reconnaissance aircraft. The final production version of the Bf.109 was the K series, or "Kurfürst." Externally similar to the G series, it had a large number of internal and aerodynamic changes that improved its effectiveness and remedied existing flaws, which kept it competitive against rival fighters.
Messerschmitt Bf.109 K-4 (1./JG77): Jagdgeschwader 77 used the last version of Bf.109 to fight in the Reichsverteidigung (defense of the Reich) during the last days of WW2, to slow the inevitable German defeat.