600 more US troops headed to Iraq in effort to retake Mosul from Islamic State

The Pentagon plans to send about 600 additional US troops to Iraq to help launch a long-awaited offensive to retake Mosul in coming weeks, the most ambitious operation yet in the two-year military campaign against Islamic State.
The escalation, which has been approved by the White House, suggests the challenges US-backed Iraqi ground forces will face in assaulting a heavily defended major urban centre that is Islamic State’s self-declared capital in Iraq and the largest city under its control anywhere.
An Iraqi victory in Mosul would effectively end Islamic State’s self-declared caliphate in Iraq. President Barack Obama would like to see the militants ejected or defeated in Iraq before he leaves office in January.
The Pentagon has about 6,000 troops, mostly operating as advisers and trainers, in Iraq. US-led coalition warplanes based outside Iraq have carried out thousands of airstrikes since mid-2014.
Most of the new US troops will be deployed to Qayyarah, an Iraqi airbase known as Q-West about 65km south of Mosul that has become a key staging base for the planned assault. Some also will be deployed to the Al Asad base, which is further west in Anbar province, to help with logistics.