Arabic translation from English

This came up in one of my two current rpg campaigns: A player gave me a background for his character that involves his struggling against an archenemy who works through an organization called "Soldiers of the Usurper." I'm bringing them on stage by having them work through a group of underground organizations whose native language is Egyptian Arabic. So I'd like to give an Arabic phrase that translates as "soldiers of the usurper." Could someone provide a translation?

It doesn't have to be literally "usurper." It could be "overthrower" or "upriser" or something like that.