Complex sentence: The Iraq Assistance Group (IAG), is in charge of the Phoenix Academy and it is the final additional training that the Military transition team (MiTT), receive before they are assigned to advise Iraqi Security Forces.
Split into simpler sentences: The Iraq Assistance Group (IAG), is in charge of the academy. The academy gives final additional training that the Military transition team (MiTT), receive before they are assigned to advise Iraqi Security Forces.