Complex sentence: As a major general he was assigned to Iraq as Commanding General of the Coalition Military Assistance Training Team (CMATT), where he was in charge of training the Iraqi military from 2003 to 2004.
Split into simpler sentences: As a major general he held the position as Commanding General of the Coalition Military Assistance Training Team (CMATT). He was in charge of training the Iraqi military from 2003 to 2004.