<P> Many U.S. officials viewed the deployment of nuclear - capable (but not nuclear - armed) B - 29 bombers to Britain as helping to resolve the Berlin Blockade of 1948--1949 . Truman and Eisenhower both had military experience and viewed nuclear weapons as potentially usable components of their military . During Truman's first meeting to discuss the war on 25 June 1950, he ordered plans be prepared for attacking Soviet forces if they entered the war . By July, Truman approved another B - 29 deployment to Britain, this time with bombs (but without their cores), to remind the Soviets of U.S. offensive ability . Deployment of a similar fleet to Guam was leaked to The New York Times . As United Nations forces retreated to Pusan, and the CIA reported that mainland China was building up forces for a possible invasion of Taiwan, the Pentagon believed that Congress and the public would demand using nuclear weapons if the situation in Korea required them . </P> <P> As Chinese forces pushed back the United States forces from the Yalu River, Truman stated during a 30 November 1950 press conference that using nuclear weapons was "always (under) active consideration", with control under the local military commander . The Indian ambassador, K. Madhava Panikkar, reports "that Truman announced he was thinking of using the atom bomb in Korea . But the Chinese seemed unmoved by this threat...The PRC's propaganda against the U.S. was stepped up . The "Aid Korea to resist America" campaign was made the slogan for increased production, greater national integration, and more rigid control over anti-national activities . One could not help feeling that Truman's threat came in useful to the leaders of the Revolution, to enable them to keep up the tempo of their activities ." </P> <P> After his statement caused concern in Europe, Truman met on 4 December 1950 with UK prime minister and Commonwealth spokesman Clement Attlee, French Premier René Pleven, and Foreign Minister Robert Schuman to discuss their worries about atomic warfare and its likely continental expansion . The United States' forgoing atomic warfare was not because of "a disinclination by the Soviet Union and People's Republic of China to escalate" the Korean War, but because UN allies--notably from the UK, the Commonwealth, and France--were concerned about a geopolitical imbalance rendering NATO defenseless while the United States fought China, who then might persuade the Soviet Union to conquer Western Europe . The Joint Chiefs of Staff advised Truman to tell Attlee that the United States would use nuclear weapons only if necessary to protect an evacuation of UN troops, or to prevent a "major military disaster". </P> <P> On 6 December 1950, after the Chinese intervention repelled the UN Command armies from northern North Korea, General J. Lawton Collins (Army Chief of Staff), General MacArthur, Admiral C. Turner Joy, General George E. Stratemeyer, and staff officers Major General Doyle Hickey, Major General Charles A. Willoughby, and Major General Edwin K. Wright met in Tokyo to plan strategy countering the Chinese intervention; they considered three potential atomic warfare scenarios encompassing the next weeks and months of warfare . </P>

Where did most of the korean war take place