Exclusive: Fresh advance in east Mosul to begin within days - U.S. commander

Iraqi forces will resume their push against Islamic State inside Mosul in the coming days, a U.S. battlefield commander said, in a new phase of the two-month-old operation that will see American troops deployed closer to the front line in the city.

The battle for Mosul, involving 100,000 Iraqi troops, members of the Kurdish security forces and Shi'ite militiamen, is the biggest ground operation in Iraq since the U.S.-led invasion of 2003. The upcoming phase appears likely to give American troops their biggest combat role since they fulfilled President Barack Obama's pledge to withdraw from Iraq in 2011.

Elite Iraqi soldiers have retaken a quarter of Mosul, the jihadists' last major stronghold in Iraq, but their advance has been slow and punishing. They entered a planned "operational refit" this month, the first significant pause of the campaign.

will put U.S. troops inside of Mosul proper and at greater risk, though James said the danger level was still characterized as "moderate". Three U.S. servicemen have been killed in northern Iraq in the past 15 months.

James, speaking from an austere outpost east of Mosul where several hundred U.S. troops are stationed, said the pace of the upcoming phase on the eastern side would depend on resistance from Islamic State, also known as ISIS, ISIL or Daesh.

"If we achieve great success on the first day and we gain momentum, then it may go very quickly. If Daesh fights very hard the first day and we run into a roadblock and we have to go back and go OK that was not the correct point of penetration, it may take longer," he said.

INTEGRATION

Further integration with the Iraqi troops - to what commanders described as an unprecedented level for conventional U.S. forces - will help synchronize surveillance, air support and force movement, according to James.

"It increases our situational understanding. The man on the ground knows what's going on best," he said. "It's just better when they're on the ground talking to each other and saying, 'Hey, have you looked at that area over there? That's decisive terrain. Have you thought about putting forces there?'"