Quotes from Joseph M. Siracusa

Case studies of Cold War-era conflicts suggest two ironclad, unwritten rules: first, no nuclear power may use military force against another nuclear power; and, second, a nuclear power, using military force against a non-nuclear nation, may not use nuclear weapons. Moreover, possessing nuclear weapons did not necessarily deter a non-nuclear nation from waging war with a client state of a nuclear power, as the United States found out in the Korean and Vietnam Wars.