Answer: the treaty of non-aggression
Explanation:
When the Japanese empire was dismantled at the end of World War Two, Korea fell victim to the Cold War. It was divided into two spheres of influence along the 38th parallel. The Americans controlled south of the line - the Russians installed a communist regime in the north, later ceding influence to China.
Kepler did multiple things, but his most famous work is demonstrating that the planets move in an elliptical (kind of like an oval) orbit around the sun instead of a circular orbit.
