In June 1950, North Korean forces crossed the 38th Parallel into South Korea, and the United States intervened to prevent the spread of communism, thus engaging in a three-year war which finished the Truman administration, led Eisenhower to contemplate the tactical use of nuclear weapons and put an early strain on the effectiveness of the UN. Britain sent some 30,000 troops to Korea as part of the UN force despite scepticism and then alarm over US involvement and the possible global consequences. This book charts both the military and diplomatic activity of the war, looking at the strain it placed on Anglo-American relations during the Attlee and Churchill administrations, the value of British involvement and the long-term consequences.