Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

One side in this war used its outbreak as an excuse to execute political prisoners in the Bodo League Massacre. An army in this war launched the Second Phase Offensive, resulting in the longest retreat in US military history, made possible due to the heroics of the Turkish Brigade. A long stalemate during this war included the bloody battles of Heartbreak Ridge and (*) Pork Chop Hill. Another theater of this war pitted the F-86 Sabre against the MiG-15 in airspace above the Yalu River. Peng Duhai led Chinese forces in this war, in which Douglas MacArthur ordered the landing at Inchon before being replaced by Matthew Ridgway. For 10 points, name this war fought between US-led UN forces against the northern part of a divided Asian peninsula.
History