North Korea also used the Po-2 and Yak-18 as both trainers and night time harasssment attack planes.
For the communist air forces, the Po-2 was the second most widely used plane and also the second most effective plane used by the communists.
The Yak-18 also enjoyed some success, the most successful Yak-18 night harassment raid took place on June 17, 1953 when a group of Yak-18s hit the fuel dump at Inchon, destroying more than 5 million gallons of fuel.
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