The eve of war.

• 战争前夕

The eve of war.的用法和样例：

例句

1. We were on the eve of war and this time the enemy would be the United States.
   我们处于战争前夕，而此次我们的敌人是美国。
2. American investments abroad totaled only $684,500,000 on the eve of the Spanish-American War.
   美西战争前夕，美国在国外投资，总共只有六亿八千四佰五十万美元。