Iran-backed militia factions

Force in Play

Split: some factions have agreed to hand over weapons, while Kataib Hezbollah and Harakat Hezbollah Al Nujaba refuse

The last US troops left Iraq on September 30, ending a military presence that began with the 2003 invasion. About 2,500 soldiers departed their remaining bases, closing the 12-year coalition campaign against the Islamic State group.

Updated Oct 20