Australia in the Korean War weeks later by the American forces who entered through Incheon. US Army Lieutenant General John R. Hodge formally accepted the surrender of Japanese forces south of the 38th Parallel on 9 September 1945 at the Government House in Seoul. Although both rival factions tried initially to diplomatically reunite the divided nation, it was the Northern faction that eventually decided to try and do so with military force. Troops from the Soviet backed North Korean Army crossed the 38th parallel on 25 June 1950 beginning a civil war. The invasion of South Korea came as a surprise to the United Nations.
Korean War conflicts played more of a role in not deploying them than the threat of a possible nuclear exchange. When Eisenhower succeeded Truman in early 1953 he was similarly cautious about using nuclear weapons in Korea, including for diplomatic purposes to encourage progress in ongoing truce discussions. The administration prepared contingency plans to use them against China, but like Truman, the new president feared doing so would result in Soviet attacks on Japan. The war ended as it began, without U.S. nuclear weapons deployed near battle. There were numerous atrocities and massacres of civilians throughout the Korean war committed by both