noun
country involved in a conflict; belligerent state
Formal term used in international relations and news reports to refer to a nation that is a party to an armed conflict or dispute.
国連は紛争当事国に即時停戦を求めた。
The UN called on the countries involved in the conflict to cease fire immediately.
紛争当事国間の和平交渉が再開された。
Peace negotiations between the belligerent states have resumed.
Compound of 紛争 (dispute, conflict) + 当事 (party concerned) + 国 (country).