The Ilyushin Il-4 is a Soviet twin-engine bomber aircraft that was developed in the late 1930s. It played a significant role during World War II, primarily used by the Soviet Air Forces for strategic bombing missions. The Il-4 was known for its durability and ability to carry a substantial payload, making it effective in various combat scenarios. Designed by Sergei Ilyushin, the Il-4 featured a sleek, aerodynamic shape and could reach speeds of up to 400 km/h (about 250 mph). It was equipped with defensive armaments to protect against enemy fighters and could operate from short airstrips, enhancing its versatility in wartime operations.