ARMS RACE- a competition between nations for superiority in the development and accumulation of weapons, especially between the US and the former Soviet Union during the Cold War.
MUTUALLY ASSURED DESTRUCTION- Mutual assured destruction or mutually assured destruction is a doctrine of military strategy and national security policy in which a full-scale use of nuclear weapons by two or more opposing sides would cause the complete annihilation of both the attacker and the defender
NUCLEAR DETERRENCE- the military doctrine that an enemy will be deterred from using nuclear weapons as long as he can be destroyed as a consequence
BRINKMANSHIP- pushing a situation to the point of disaster without quite going over the edge. Brinkmanship is mainly a political policy.
Answer:
ARMS RACE competition to acquire more and deadlier weapons.
MUTUALLY ASSURED DESTRUCTION belief that a nuclear war would have no winner.
NUCLEAR DETERRENCE idea that the threat of nuclear war is enough to prevent an enemy attack.
BRINKMANSHIP taking a dispute to the edge of conflict to force the enemy to back down
