As the U.S. expands its war against the Islamic State, the Army is preparing to deploy a division headquarters to Iraq.

Officials have not identified the division that will deploy — the first division headquarters to go to Iraq since the U.S. withdrawal in 2011.

An official announcement is expected in the coming days. But Army Chief of Staff Gen. Ray Odierno recently confirmed the Army “will send another division headquarters to Iraq to control what we’re doing there, a small headquarters.”