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A still image from video shows Islamic State militants battling to maintain control around Mosul, Iraq

A still image from video shows Islamic State militants battling to maintain control around Mosul, Iraq August 16, 2016. Amaq News Agency via REUTERS TV ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. MUST NOT OBSCURE LOGO. FOR EDITORIAL USE ONLY. NO RESALES. NO ARCHIVES TPX IMAGES OF THE DAY

The battle for Mosul, Iraq

The Iraqi Army is preparing to close in on the northern city of Mosul, which has been under the fierce occupation of the Islamic State since July 2014.With a population once thought to reach nearly 2 million people, Mosul is the largest city ISIS holds, and the battle for it will be one of the largest ever against the armed group. (Ash Gallagher for Yahoo News)

See FULL STORY by Ash Gallagher for Yahoo News

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