He should have known the two of them would form an alliance.

I will not form an alliance with one who cannot win.

I thought we might form an alliance, although it wouldn't have done any good in the long run.

They are only starting to form international alliances to do so.

In any case, the two had quickly formed an alliance.

Yet we/you now find that they seem to have formed an alliance.

These businesses will also be able to form new alliances.

Two players may team up against the third, forming an alliance.

The school and home must form an alliance to provide quality educational programs for youth.

You haven't the imagination or ability to form an alliance against me.