Because the u.s dropped an atomic bomb into the middle of japan and threaten to do another one
Answer:Why Korea was split at the 38th parallel after World War II. ... For centuries before the division, the peninsula was a single, unified ... Map of the Korean peninsula including North and South Korea. ... to explain the drastically different paths the two nations have taken, and the continuing divide between them.
Explanation:
Americans were the white settlers.
States should decide the issue of slavery