The battle for Mosul in maps

Iraqi forces supported by a US-led coalition have been fighting to take back Iraq's second city from Islamic State since 16 October 2016

In June 2014, when the leader of Isis, Abu Bakr al-Baghdadi, declared a global caliphate, he did it from Mosul, Iraq's second city. Isis rapidly expanded its territory in Iraq and Syria throughout that year, but has since been gradually pushed back, partly due to US-led airstrikes. Losing Mosul now could spell the end of the jihadi group's ability to control large swaths of Iraq.