One would hope not.
There has never been a Nuclear War
not yet
yes
No.A nuclear war means two (or more) combatants use nuclear weapons to decimate the population and forces of the enemy.There have been no conventional (non-nuclear) wars between any States since 1865. There have been no nuclear wars either.You would have read about it, seen it, or been dead by now.
To get ready for future wars...
no
A nuclear war will never start referring to any foolish prophecy. Nuclear wars cannot speak.
Radioactive material
Presidents (Commander in Chiefs) now knew they could NO LONGER declare TOTAL WARS; in the age of nuclear weapons, wars had to be fought as LIMITED WARS...limited to "non-nuclear weapons." Such as Korea & Vietnam...to stem the tide of communism.
yes on condition of the availability of the necessary nuclear fission device (nuclear reactors or critical assemblies).
nuclear wepons
Fight wars without the use of nuclear weapons; limited wars.