"On Sunday, June 25, 1950, the North Korean Peoples Army suddenly launched its invasion of South Korea by crossing the 38th Parallel. Spearheaded by T-34/85 tanks and supported by swarms of 11- 10 Shturmovik ground-attack aircraft, the offensive rapidly pushed South Korean and UN troops back.
USAF F-80s, F-5 1 s, F-82s, and B-26s were quickly in the fray, wreaking successful havoc on Communist supply lines, and some big scores were built up against obsolescent Russian- built piston-engined aircraft; as the tide of war was beginning to turn and the North Korean advance slowed down to a halt, the advent of the Mikoyan-Guryevich MiG-15 mid-wing monoplane jets came to the Allies as one of the nastiest surprises of the war.
On November 1, 1950, UN pilots submitted first sighting reports of MiG- 15s in Korean colors and, although 12 days later the first victory was reported, it soon became very obvious that the F-80s, F-84s, and Meteors had at a stroke become obsolete. The MiGs could even outclimb the F-86s that entered combat in December, 1950, and enjoying an untouchable ceiling of 15,200 meters, they could dive down on their prey and climb back up to a safe position after striking with relative impunity. From their experience Russian pilots determined that the MiG's main strength though lay in its enormous firepower, offered by one N-37 37mm cannon and two NS-23KM 23 mm cannon. A two-second burst would pour a devastating 14 kilograms of lead into the enemy plane, tearing it to pieces, while the MiG could take a lot of punishment from the Sabres' .50 caliber guns thanks to its heavier armor protection…"
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