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.
The north seemed to gain more of its goals. The balance of the senate was now with the free states . The major victory for the south was the Fugitive Slave Law (FSL). In the end the north refused to enforce it.