Who Started the Korean War?

To Cold War hawks the ambitions of Stalin lay behind Kim Il Sung. Only with the opening of archives some 50 years later did Soviet responsibility for the Korean War become known.

US Marines land at Inchon in Korea, 15 September 1950. US National Archives. Public Domain.

On June 25th, 1950, Communist North Korea launched an invasion across the 38th Parallel into South Korea. Initially taken aback, the West, under American leadership, quickly recovered and within days had obtained United Nations Security Council agreement to repel the attack. For President Truman this was a decisive encounter. As he saw it, North Korea’s Communist leader Kim Il Sung was not acting independently, nor was the aim of this attack simply limited to reunification of the divided Korean peninsula. In this aggressive action he discerned the hand of the USSR, and possibly that of Communist China. In Truman’s words: ‘The Reds were probing for weaknesses in our armour; we had to meet their thrust without getting embroiled in a world-wide war’. His Secretary of State, Dean Acheson, also concluded that ‘it seemed close to certain that the attack had been mounted, supplied and instigated by the Soviet Union...’, and:

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