Question

What was the significance of the 38th parallel before the Korean War? When US troops moved north of it, the Chinese decided to fight. It was the location of the Yalu River boundary between North Korea and China. It served as the boundary between North Korea and South Korea. It marked the first site of North Korean aggression.

Answer 1

It served as the boundary between North Korea and South Korea

Step-by-step explanation:

Answer 2

The main significance of the 38th parallel before the Korean War was that "It served as the boundary between North Korea and South Korea" since this was decided upon.