The Yakolev Yak-1 was a Soviet fighter aircraft developed during World War II. It first flew in 1940 and became one of the most important fighters for the Soviet Air Force. The Yak-1 was known for its agility, speed, and effective performance in dogfights against enemy aircraft. Designed by Alexander Yakovlev, the Yak-1 featured a low-wing monoplane design and was powered by a V-12 engine. It was equipped with a combination of machine guns and cannons, making it effective in both air-to-air and ground attack roles. The aircraft played a significant role in the defense of the Soviet Union during the war.