Examples

宣战。

to declare war (on sb)

(向某人)宣战

There was little the Phoenix King could do but finally declare war against one of his own realms.

菲尼克斯国王无计可施，最后只能向他的一个王国宣战。

There was little the Phoenix King could do but finally declare war against one of his own realms.

凤凰国王无可奈何，终向他自己的属国宣战。

Napoleon and Hitler waged war against all of Europe.

拿破仑和希特勒对全欧洲宣战。

The president declared war.

总统宣战了。