The Bf 109, officially known as the Messerschmitt Bf 109, was a German fighter aircraft that played a significant role during World War II. Designed by Willy Messerschmitt, it first flew in 1935 and became one of the most produced fighter planes in history. The Bf 109 was known for its speed, agility, and advanced engineering, making it a formidable opponent in aerial combat. Throughout the war, the Bf 109 served in various roles, including as a fighter, interceptor, and ground-attack aircraft. It was used by the Luftwaffe, Germany's air force, and saw action on multiple fronts, including the Battle of Britain and the Eastern Front. Its legacy continues to influence aircraft design and military aviation history.