“交战国的”可以用英语表达为 “of the warring states” 或 “belonging to the warring nations/countries” 。其中，“warring”意为“交战的；处于战争状态的” ，“states”或“nations/countries”指“国家”。
例如：
The economic situation of the warring states was extremely unstable.（交战国的经济形势极其不稳定。）
This policy caused great dissatisfaction among the people belonging to the warring countries.（这项政策在交战国人民中引起了极大的不满 。）