atomic war; nuclear war
Refers to warfare using atomic or nuclear weapons. Often used in historical or cautionary contexts.
The threat of atomic war escalated during the Cold War.
International efforts are needed to prevent nuclear war.
核戦争 is a more common modern term for nuclear war, while 原子戦争 is slightly older and more closely tied to the atomic bomb era.
Compound of 原子 (atomic) and 戦争 (war).