On that April ‘Black Thursday’ over 70 years ago, the air war over Korea changed as the Allies scrambled to counter the superior MiG-15 jet fighter.

https://getpocket.com/explore/item/the-day-soviet-aircraft-attacked-american-pilots

There's really alot more to this story, but an interesting primer for those who like military aviation. We always heard the Sabre was superior to the MIG. It looks like that depends on who was flying the MIG.