Polikarpov I-15, I-16 and I-153 Aces

The I-15, I-16 and I-153 fighters were the world's first mass-produced fighters. Some 17,000 Polikarpovs had been manufactured by the time production ceased in 1941. They served with the Republicans in the Spain, the Chinese against Japan in 1937-38, and the Soviets against both Japan in the Nomonhan Incident and Finland during the Winter War.