This document provides a brief overview of the different roles of the US Army, Navy, and Marine Corps in Operation Iraqi Freedom. It discusses the history and purposes of each branch, with the Army providing occupying forces after the initial invasion, the Navy transporting Marines and supplies to the Gulf as well as conducting some ground operations, and the Marines typically used as a fast-acting attack force but playing an extensive role in Iraq for seven years before handing over control of the Anbar province. The document concludes that all branches of the US Armed Forces served their country exemplarily in Operation Iraqi Freedom.