when did the latter take place?
From  25 June 1950 to 27 July 1953
Korean War
. The war began on 25 June 1950 when North Korea invaded South Korea following clashes along the border and insurrections in the south. The war unofficially ended on 27 July 1953 in an armistice.

who was george andrew davis jr.? He was a highly decorated fighter pilot which army did he serve for? The United States Army what was his position in army? He was a major, and was promoted posthumously to lieutenant colonel has he won any medal? Medal of Honor for what? For his actions in "MiG Alley" during the Korean war name a few other wars he was a part of? World War II and  Korean War
wiki:7678537
Korean War [SEP] Introduction
These UN decisions were taken without participation of the Soviet Union and the People's Republic of China, both of which supported North Korea. Twenty-one countries of the United Nations eventually contributed to the UN force, with the United States providing around 90% of the military personnel.