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why did north korea attack south korea in 1950
The communist leader of North Korea, Kim Il Sung, decided to attempt to reunify Korea under his control. On June 25, 1950, Kim launched a surprise invasion of South Korea.
why was korea divided
When the Japanese empire was dismantled at the end of World War Two, Korea fell victim to the Cold War. It was divided along the 38th parallel.

Question: who divided the country
Self-contained rewrite: who divided korea