Question

After World War II. which country was partitioned at the 38th parallel?

Answer 1

Korea.

Explanation:

After WWII and the defeat of Japan, Korea (a former "colony" of Japan) was "liberated" by the Soviet Union (USSR having declared war on Japan in the final stages of the war) in the North and the USA in the South establishing the 38th parallel as a boundary between the two..."liberators"..
The North soon acquired a communist like government while the South a pro-western one.
The increasing tensions between USSR and USA (ensuing almost immediately after the war) led to the Cold War and finally to the armed confrontation between North and South Korea (Korean War, 1950-1953).