“They have been in the city at different times, yes,” Col. John Dorrian, spokesman for Operation Inherent Resolve, told reporters, according to ABC News. Though, he said, “they’ve advised Iraqi Security Forces as they’ve moved forward. They remain behind the forward line of troops.”
The battle to retake Mosul began in October, and Iraqi forces have encountered fierce resistance and significant casualties. For example, Iraq’s elite “Golden Brigade” of special operations troops have suffered upwards of “50 percent casualties” in the fight, which could eventually make them combat ineffective, according to a Pentagon officer who spoke with Politico.
Casualties have also hit US forces as well. Since October, the number of Americans wounded in combat has nearly doubled since OIR kicked off in August 2014.