ph.

1. The king decided to go to war against his enemies.
国王决定对敌人开战。

1. 开始作战：go to the expense of 为...的目的花钱 | go to war 开始作战 | go together 相配;恋爱

2. 交战：go to the sea 出海 | 7.go to war 交战 | go to the war 参军

3. 当兵, 开始作战：parenchymatous cartilage 实质软骨 | go to war 当兵, 开始作战 | latent immunization 隐性免疫作用

4. 开战,战争：227.go to sea 到海外,充水手. | 228.go to war 开战,战争. | 229.go without saying 不言而知,毋须说得.

verb

1. commence hostilities

Synonym: take armstake up arms