korea, united states, ussr, vietnam, and germany?
Hitler's country, which was actually Austria, got involved in World War 2 in 1939, the year the war started.
There are war crimes commited by every country or group since the dawn of time. I don't get the point of your question.
because ussr forced north korea to be communist by army
South Korea, US vs North Korea, USSR, China
they were involved by sending troops to help south Korea fight north Korea.
North Korea. The war started when North Korea invaded South Korea in an attempt to unify the Korean peninsula for communism. (Later in the war, China became involved, so the UN force was also engaged with the Chinese army.)
No. North Korea did not exist until after World War 2.
Vietnam and Korea .
nope
Korea
By attacking the Republic of Korea!