>> They say they won't leave until they liberate Mosul from Islamic State. Many in the National Mobilization Force are from the Iraqi city or have family who have died in the conflict. But, these predominantly Sunni troops say they don't have the resources to do it alone.
sul has been in the hands of IS since 2014, the assault to retake it expected to begin in a matter of weeks.
But it's success depends on a complicated sectarian relationship, according to Reuters Michael Georgy in Iraq.>> Many of the members of this Sunni force that we spoke to including commanders all complain that they've requested weapons from the Central government which is Shiite led and they don't feel they're getting enough cooperation.
They interpret this as part of Iraq's tractarian tension. And certainly, it's not a good sign ahead of this affected in which the Prime Minister is trying to unite everybody.>> Among the 2,500 strong force are Shiites, Kurds and Yazeetees, a community singled out by IS for persecution. Many of the commanders are army officers who served under Saddam Hussein.
They say they are primed for battle and could muster twice as many fighters if they had more support. Iraq's prime minister Haider al-Abadi now under strain to bring them together, before the divide undermines a crucial offensive.>> Yes, Al-Abadi, the prime minister is under huge pressure to rein in everybody, to try to stabilize the country.
He doesn't have many resources, the budget's under pressure because of low oil prices. There are are also regional concerns. I mean, this camp is a prime example of just how complex it is.>> If Mosul is recaptured, the real test could then begin. Al Abadi faced with rebuilding a shattered city, while bringing fractured groups back together in his bid for national unity.