Operation Hudson Harbor

In October 1951, the U.S. effected Operation Hudson Harbor to establish nuclear capability against any communist forces and to scare the Soviets from action. B-29 bombers practiced individual runs (using dummy nuclear or conventional bombs) from Okinawa to North Korea. Every factor of these missions could not be the same as an actual nuclear strike, as there is no way to replicate all of the steps from preload testing through the actual release of the bombs while using conventional bombs. The intention was to both be entirely prepared for any ordered strikes and also intimidate the communists with the ease of US ability to fly nuclear bombs overhead.^[1][2][3]

Nuclear cores were deployed and thus the Air Force had several nuclear weapons at their disposal. Command of any nuclear strike was given to General Curtis LeMay. The plan was to destroy large military targets, power plants, and also create a ring of blast zones through Manchuria to dissuade any further intervention from the communists. Although the use of nuclear weapons was approved, they were never needed because the Chinese and North Koreans eventually signed the Korean Armistice Agreement. In actuality, although the US almost lost the war and was prepared to follow through with the plan, by 1953 the US had pushed the communist forces back across the current armistice line before a ceasefire was called, and thus it was unneeded.^[1][2][3] Had the United States gone through with the attacks, hence setting precedent for the use of nuclear weapons in proxy wars, it's likely the stakes of the Cold War would have increased dramatically.

• Nuclear blackmail
• Pumpkin bomb