Axis side, I think. Offically, Korea was part of the Japan New Order since long before World War 2 (Before Year 1900, not sure the exact Year.). Therefore, the role of Korea was to produce supplies for Japan and attacked China (Full-scale invasion) after 1937. (2 years before World War 2.) But, in locally, there are Koreans Gurillea Force that attacks on Japanese troops after Japan's occupation. Well, these people were later made to form North Korean Government in 1948, led by Kim Il Sung.(A head of the Gurillea force, which was supported by USSR,who is anti-Axis.)
it was freed
Increased involvement in the war
1941
the cause
There was none....
they were a allie.
It has changed from a farming to an industrial economy.
Victory.
How_did_the_us_involvment_in_World_War_2_escolate
1945
Supplying Allies with weapons
The Japanesse surrender.