Puyi, was captured by the Red Army. On August 18, several Soviet amphibious landings were conducted ahead of the land advance: three landings in northern Korea, one landing in South Sakhalin, and one landing in the Kuril Islands. This meant that, in Korea at least, there were already Soviet soldiers waiting for the troops coming overland. In South Sakhalin and the Kurils, it meant a sudden establishment of Soviet sovereignty. The land advance was stopped a good distance short of the Yalu River, the start of the Korean Peninsula, when even aerial supply became unavailable. The forces already in Korea were able to establish control in the peninsula's northern area. In accordance with arrangements made earlier with the American government to divide the Korean Peninsula, Soviet forces stopped at the 38th parallel, leaving the Japanese still in control of the southern part of the peninsula. Later, on 8 September 1945, American forces landed at Incheon. Aftermath The invasion of Manchuria was a factor that contributed to the surrender of Japan and the end of World War II. In addition, the Soviet occupation of Manchuria, along with the northern portions of the Korean Peninsula, allowed for those regions to be transferred by the Soviet Union into the control of local communists. The control of these regions by communist governments backed by Soviet authorities would be a factor in the rise of the Chinese Communists and shape the political conflict of the Korean War. Several thousand Japanese who were sent as colonizers to Manchukuo and Inner Mongolia were left behind in China. The majority of Japanese left behind in China were women, and these Japanese women mostly married Chinese men and became known as "stranded war wives" (zanryu fujin). Because they had children fathered by Chinese men, Japanese women were not allowed to bring their Chinese families back with them to Japan, so most of them stayed. Japanese law only allowed children fathered by Japanese fathers to become Japanese citizens. In late 1949, numerous members of the former Kwantung Army who had been captured in the Soviet invasion of Manchuria were convicted in connection with the activities of Unit 731, and related units for their connections with crimes against humanity and the use of chemical and biological weapons. War crimes During the invasion of Manchuria, Soviet soldiers killed and raped Japanese civilians. The most famous example was the Gegenmiao massacre, Soviet soldiers