cobelligerent
Cobelligerent refers to two or more nations or entities that are engaged in a common war against a common enemy, but without a formal alliance or mutual defense treaty. This means that while their military objectives align in a particular conflict, they do not necessarily share political goals or obligations beyond that specific war.
The relationship of cobelligerence is distinct from that of an ally. Allies typically enter into formal agreements
Historically, instances of cobelligerence have occurred in various conflicts. For example, during World War II, the