The two sides were:
Yes , for example World Wars 1 and 2 .
625,000 Civil War (both sides USA) 116,516 WW1 416,800 WW2 36,516 Korea 58,209 Viet Nam
Korea did not fight in world war 2. So the answer is no.
it spilt in 2 North Korea and South Korea
US and USSR
United States supported South Korea after World War 2.
United States supported South Korea after World War 2.
United States supported South Korea after World War 2.
United States supported South Korea after World War 2.
Korea seperated 5 years after end of World War 2
Korea was divided into North and South Korea after World War 2. North Korea was occupied by the Soviet Union, while South Korea was occupied by the United States. The division led to the Korean War in 1950.
This is due to the Korean War in which both North and South Korea claim to be the legitimate government of Korea. The Korean Demilitarized Zone along the 38th Parallel now separate the two sides but no permanent peace treaty has been signed.