For questions regarding war involving nuclear weapons. This includes detente, mutually assured destruction, proliferation, explosion yields, and survivability. For after-effects, use [post-apocalypse].
The atomic bomb has been used twice in war on Earth. The cities of Hiroshima and Nagasaki were obliterated in 1945 to bring a swift end to World War II. Since then, other nations have acquired nuclear weaponry, but none have actually deployed these weapons of mass destruction.
The nuclear-war tag should be deployed for questions investigating the strategy and tactics of such weapons in conflicts between nations or multinational corporations. The use of tactical nukes and dirty bombs in terrorist operations is outside the scope of this tag (use terrorism instead).
After a full-scale nuclear war, Earth would be substantially changed. For questions about the post-war period, use the post-apocalypse tag.