Turkey said on Monday it would not withdraw hundreds of soldiers who arrived last week at a base in northern Iraq, despite being ordered by Baghdad to pull them out within 48 hours.

The sudden arrival of such a large and heavily armed Turkish contingent in a camp near the frontline in northern Iraq has added yet another controversial deployment to a war against Islamic State fighters that has drawn in most of the world’s major powers.

Ankara says the troops are there as part of an international mission to train and equip Iraqi forces to fight against Islamic State. The Iraqi government says it never invited such a force, and will take its case to the United Nations if they are not pulled out. […]