1) Nuclear weapon 
Nuclear warfare (sometimes atomic warfare or thermonuclear warfare) is a military conflict or political strategy in which nuclear weaponry is used to inflict damage on the enemy. Compared to conventional warfare, nuclear warfare can be vastly more destructive in range and extent of damage, and in a much shorter time frame. A major nuclear exchange...
War involving the use of nuclear weapons. Nuclear-weapons research began in Britain in 1940, but was transferred to the USA after it entered World War II. The research programme, known as the...
Nuclear warfare is warfare where one or more sides has used nuclear weapons.
Warfare involving the use of nuclear weapons. ... (12 Dec 1998) ...