I'm trying to stay on topic about the reason Korea is the forgotten war but the radical left keeps trying to turn it into a political issue.
Because war is a political issue. You can't separate the killing from the competing ideologies that launch the wars.
At the end of WWII, Communism and Capitalism faced off in Korea and in Greece. In both countries, the communists had lead the fight against Germany and Japan, and in both countries the communists were denied the right to establish popular governments because the US and England "knew better."
"The guerilla army of ELAS (National People’s Army of Liberation) under the leadership of the KKE (Communist Party of Greece), led the resistance to Nazi occupation during the War. Inspired by the success of Tito’s partisan army in Yugoslavia, ELAS held two-thirds of the country in February 1945, at which time a truce was negotiated with the Royalists.
In October 1946, DSE (Democratic Army of Greece) launched a campaign to win control of the whole country, and received support from neighboring Yugoslavia, Albania and Bulgaria.
"Despite the presence of British troops and aid from the US, the Royalists were not expected to last long against the guerillas.
"Citing the situation in Greece, the inability of the British to cope with the situation and alleged breaches of the Yalta Agreements in Romania, Poland and Bulgaria, US President Harry Truman launched the ‘Cold War’.
"Truman ultimately decided to break irrevocably from the alliance with Stalin formed during the Wold War II, terminating aid to the USSR and pledging significant monetary aid to the Royalists in Greece under the guise of the 'Marshall plan.'”
In Korea and Greece the communists resisted the Axis powers while many capitalists, especially the rich ones, collaborated with Hitler and Tojo.
The Greek Civil War