Eg. the two countries were leagued together to fight against another country .

这两个国家被结成同盟来对付另一个国家。

The nations leagued together to stop the war .

这些国家结成联盟来制止战争。

The two countries were leagued together .

那两国订有盟约。

The two countries were leagued with each other .

那两国彼此订有盟约。

They were leagued together by a treaty .

他们根据默契联合了起来。