A newly disclosed U.S. base in northern Iraq has come under attack again from ISIL, two days after a U.S. marine was killed in a rocket attack at the base in the town of Makhmour. The death of Staff Sgt. Louis Cardin revealed the existence of the new base and took place during an unannounced deployment of U.S. troops to the area. While the deployment began about two weeks ago, it was not announced until Sunday, the day after Cardin’s death. The deployment of U.S. troops to an area where ISIL is active marks the latest sign of deepening U.S. involvement in Iraq.