Please, check this sentence

[motico]

Please, check if the following sentence is grammatically correct. Thanks

If this phenomenon gathers momentum, the leader will surrender and will leave for a remote and safer shelter, abandoning his tribe's mates, even if their chances of withstanding the rebels alone are low.

[Rover_KE]

It looks grammatical enough, but you need to find a better word than the informal mates in this kind of serious context.

Rover

[motico]

What word would you suggest?

[Rover_KE]

Allies.