After weeks of speculation about an attempt to retake the city of Mosul from the so-called Islamic State (IS), Iraqi Prime Minister Haider al-Abadi proclaimed the start of the offensive. "God willing, the decisive battle will be soon," he said at a press conference.
The hour has struck. The campaign to liberate Mosul has begun. Beloved people of Mosul, the Iraqi nation will celebrate victory as one— Haider Al-Abadi (@HaiderAlAbadi) October 17, 2016
This could well be a major turning point in the battle against IS. Mosul, Iraq's second-largest city, has been under IS's control since June 2014, when it became the group's biggest prize yet. It brought global attention that IS have enjoyed ever since. In the ensuing two or so years, it has ruled over the city's hundreds of thousands of residents in accordance with a strictly enforced fundamentalist version of Sharia law.
The group's last major stronghold in Iraq, Mosul is one of the jewels in IS's crown, and losing it would be a huge blow - especially after the group was routed from Dabiq, the Syrian town whose name graces the IS magazine. Fearing the worst, IS set oil refineries on fire to obstruct and delay the oncoming forces, while the Washington Post reports that the group has strategically decided to flee Mosul and regroup in Syria, moving from defensive to insurgency tactics. Such a move is facilitated by the strategy coming out of Baghdad, which has encircled Mosul but left a corridor to the West of the city where IS fighters (and supporters) can flee to Syria. This strategy seeks to move the IS problem out of Iraq and into Syria.
The forces assembled to mount the offensive include somewhere in the region of 45,000 troops; they include Iraqi Shias, Sunnis, Christians and Kurds, but also Shia paramilitary groups known as the Popular Mobilisation Units. Supporting and advising this assault are British, American and Turkish special forces, while the US-led coalition has targeted IS mortar positions close to Mosul.
Final authority rests with the Iraqi army - but as is true of the Iraqi state generally, the army's authority is seriously undercut by the tensions between the country's different tribal factions. Lt. Gen. Stephen Townsend, commander of the US's Operation Inherent Resolve against IS in Iraq,stressed that despite these differences, "the thousands of ground combat forces who will liberate Mosul are all Iraqis".
Nonetheless, one of the most immediate and serious challenges for the Mosul offensive is to keep this rather motley crew together. Many of them have competing loyalties and goals; they have a long and complex history with each other, and ensuring their unity is paramount.
There's also the imperative of keeping Mosul's civilians safe during what promises to be a period of uncertainty, chaos and violence. Stephen O'Brien, under-secretary-general for humanitarian affairs at the UN, called for all parties "to uphold their obligations under international humanitarian law to protect civilians and ensure they have access to the assistance they are entitled to and deserve".
The hard work begins
For all the fanfare, the liberation of Mosul will not mean the end of IS. The group has never been defined by the territory it holds. As Stephen Royle and I argue in our book The Origins of IS, IS is the product of deep political and sectarian disenfranchisement and of the dire socio-political conditions on the ground in Iraq.
Mosul in particular is a largely Sunni city, and a number of its residents welcomed IS in 2014 simply because it broke the authority of the corrupt and sectarian Shia government in Baghdad. That said, opposition to IS's reign has been steadily growing - documented among others by Mosul Eye, which has recorded instances of everyday resistance in the city.
The situation on the ground is shifting rapidly, and Kurdish Peshmerga forces have already reportedly seized control of a number of villages to the east of Mosul. The state of play is extremely fluid, and by the time forces reach the suburbs of the city it will surely look very different.
Despite al-Abadi's proclamation that the people of Iraq would celebrate the fall of the city as one, the schisms among his people run deep. In the short term, he's right to stress that "these forces that are liberating you today, they have one goal in Mosul, which is to get rid of Daesh [IS] and to secure your dignity. They are there for your sake". But in the longer term, the social and political situation in Iraq is not nearly so clear cut.
And while most Iraqis certainly would celebrate the defeat of IS, questions about what comes next - for Iraq, for Syria, and for the Middle East - simply throw up a whole other set of problems. Mosul will be far from the last battle.