This country assisted north Korea directly in the Korean War.

Answer 1

During the Korean War (1950-1953), China provided substantial military assistance to North Korea. Following the invasion of South Korea by North Korean forces, China intervened in the conflict, sending troops to support North Korea against the United Nations forces, which were primarily led by the United States. This intervention was pivotal in turning the tide of the war, as Chinese forces engaged in significant battles alongside North Korean troops.