Use of nuclear weapons in wartime.
Truman in WW2 on Japan.
no
The first Soviet nuclear weapon was tested in 1949. They have never used one in combat.
The first one used in combat was called Little Boy.
No, the hydrogen fusion bomb was not developed until 1952. The first nuclear weapons were developed and used in combat in 1945.
hittites
The meaning of the word nuclear weapon, is a weapon that has a nuclear warhead on it.
plutonium + weapon
The first combat use of the atomic bomb was against Hiroshima, Japan on 6 August, 1945. Three days later, on 9 August, the second (and so far last) use of a nuclear weapon in combat was made against Nagasaki, Japan.
Only two nuclear weapons have been used in combat, both quite primitive designs to the weapons that are deployed today. The weapon with the most quantities in the current active US nuclear stockpile is the W76/Mk-4 warhead.
Truman
Plutonium is the core of a nuclear weapon; the nuclear fission release an enormous quantity of energy and radiations.