Origins of the Korean War, page 2. On August 10, 1945, after the US dropped atomic bombs on Hiroshima and Nagasaki, Japan offered surrender in World War II. Soviet troops, part of the Allied forces, immediately began pouring into Korea. The US was appalled, and moved quickly to prevent all of Korea from becoming a Soviet satellite state.
http://www.sparknotes.com/history/american/koreanwar/section2.rhtml
Michael Hickey was commissioned in 1949 and served with the RASC in Korea from 1950-52. In 1981, he retired as a General Staff Colonel with the Ministry of Defence. He is the author of The Unforgettable Army - Slim and the 14th Army in Burma (1992); Gallipoli (1995) and The Korean War 1950-53 (1999).
http://www.bbc.co.uk/history/worldwars/coldwar/korea_hickey_01.shtml
History of the Cold War. The Origins of the Cold War are widely regarded to lie most directly in the relations between the Soviet Union and the allies (the United States, Great Britain and France) in the years 1945–1947. Those events led to the Cold War that endured for just under half a century. Events preceding the Second World War, and even the Russian Revolution of 1917, underlay pre–World War II tensions between the Soviet Union, western European countries and the United States.
https://en.wikipedia.org/wiki/Origins_of_the_Cold_War
The Origins of a War. The roots of the Korean War are deeply embedded in history. While few regions are less suited to warfare than is the mountainous, river-slashed Korean peninsula, few have known more conflict. For centuries, Korea's three powerful neighbors--China, Japan, and the Soviet Union--vied for its control.
http://history-world.org/korean_war.htm
In response, 16 nations sent troops to the aid of South Korea. The United States sent an army; Great Britain, a division; and other nations, lesser units. The heaviest burden of the war, however, was borne by South Korea itself.
http://history-world.org/korean_war.htm
Harry Gledden in Korea © The allies achieved total naval supremacy when the North Korean navy's torpedo boats were blown out of the water by UN firepower. For the rest of the war, American, British, Commonwealth and other allied ships maintained a tight blockade on North Korea.
http://www.bbc.co.uk/history/worldwars/coldwar/korea_hickey_01.shtml
At the end of World War II, the US was not ready for occupation of Korea. It had no Korean language officers, and no Korea experts. When he arrived in south Korea, Lt.-General Hodge was forced to leave most of the Japanese bureaucracy in place because he had no one to replace them with.
http://www.sparknotes.com/history/american/koreanwar/section2.rhtml
Upon hearing of the North Korean attack, President Harry S. Truman directed General of the Army Douglas MacArthur, commander of the United States occupation forces in Japan, to insure the safe evacuation of United States civilians and to supply weapons and ammunition to South Korea.
http://history-world.org/korean_war.htm
Although attacks came all along the border, the major North Korean thrust was in the west of the Korean peninsula, toward Seoul, the capital of South Korea. South Korea's army, smaller and not as well trained and equipped as that of North Korea, was unable to stem the onslaught.
http://history-world.org/korean_war.htm
The Soviet recognized the KPR, while the US did not. Kim Il-Sung, a Korean guerrilla leader from the 1930s, emerged as the leader of the pro-Soviet KPR in North Korea. In the south, Lt.-General John Reed Hodge, who had commanded XXIV Corps at Okinawa during World War II, oversaw the occupation of South Korea.
http://www.sparknotes.com/history/american/koreanwar/section2.rhtml
what were the origins of the korean war
Korea and more were the origins of the Korean war. Korea was the origin of the Korean War.