The final two of six U.S. soldiers killed in a drone strike during the Iran war have been identified by the Department of Defense. Maj. Jeffrey R. O'Brien, 45, of Indianola, Iowa, and Chief Warrant Officer 3 Robert M. Marzan, 54, of Sacramento, California, are believed to be the sixth individual to die from the drone strike. The attack occurred on March 1 in Port Shuaiba, Kuwait. The first four Army Reserve Soldiers were previously identified as Capt. Cody A. Khork, 35, of Winter Haven, Fla., Sgt. 1st Class Nicole M. Amor, 39, of White Bear Lake, Minn., and Sgt. Declan J. Coady, 20, of West Des Moines, Iowa. The drone strike came just one day after President Donald Trump announced that the United States would be taking "massive and ongoing" military action, dubbed "Operation Epic Fury".