
A member of Iraq's elite counterterrorism forces pauses as they advance towards the city of Mosul. 20 October 2016. Khalid Mohammed/AP/Press Association Images. All rights reserved.The long-awaited military assault on ISIS in Mosul began on 16 October, two years and four months since the movement seized the city in its advance across northern Iraq. Its initial moves were accompanied by much hype from western broadcasters, though this eased within a day amidst some confusion over the pace of operations. Iraqi government officials reported that Kurdish elements were seeking more time to complete the first phase of their operations, whereas Kurdish sources said that they had achieved their objectives and were waiting for Iraqi army units to advance. At the same time, sources point to extensive ISIS use of mortars, car- and truck-bombs and roadside devices, all of them capable of hampering the attackers' progress.
ISIS, with at most 6,000 fighters at its disposal in Mosul, faces much larger numbers – around 80,000 in all – arrayed against it. That imbalance could yet be a factor in the decision of the movement's leaders about whether to abandon the city. When Ramadi was retaken in 2015, the Iraqi attackers numbered around 10,000, while 15,000 were deployed in the battle for Fallujah earlier this year. Yet the early indications are that many of the ISIS paramilitaries will stay. If so, a pattern may emerge similar to Ramadi. There, a battle expected to last little more than a fortnight extended for four months, with much of the city severely damaged in airstrikes and artillery bombardments.
Some indication of the tenacity of ISIS paramilitaries is shown by what has happened in the much smaller stronghold of Sirte in northern Libya. The war to oust ISIS from Sirte started in May with high expectations, but quickly slowed to a crawl leading to extensive use of American airpower in August to support the government forces. That was expected to tip the balance markedly in favour of the United Nations-backed government of national accord (GNA), and by September it was reported that ISIS was making its final stand.