The Korean War’s air combat is best known for the duels of MiG-15s and F-86 Sabres in the world’s first jet-vs-jet matchups. An unusual sideshow to that was North Korea’s use of woefully obsolete WWII types as night harassment planes. They were called “Bedcheck Charlies” by the Americans.
(North Korean Po-2 “Mule” which was used as a Bedcheck Charlie plane, just as the Soviets had done during WWII.) (artwork via Wings Palette website)
(The MBR-2bis, another WWII Soviet plane used by the North Koreans for Bedcheck Charlie missions.)
(Two of the WWII-legacy American answers to the problem: a F4U-5NL Corsair and in the background, a F7F-3N Tigercat.)