state of war
Formal term used in legal, political, or historical contexts to describe a condition of active warfare between parties.
The two countries are still in a state of war.
They declared the end of the state of war.
戦時 means 'wartime' as a period, while 戦争状態 specifically refers to the legal or factual condition of being at war.
交戦状態 emphasizes active combat engagement, whereas 戦争状態 is a broader term for the state of war.
declaration of ending a state of war
Compound of 戦争 (war) and 状態 (state, condition).