In the Korean War, the swept-wing jet-powered MiG-15 quickly outclassed initial superiority of United Nations forces. The United States introduced its own swept-wing F-86 Sabre, which claimed kill ratios as high as 10 to 1 against the MiGs. The Grumman F9F Panther, the mainstay for the USN during the war, was a straight wing carrier-based jet; it had a good showing, even having a 7:2 kill ratio against the more powerful Mig-15.