This chapter discusses Marine Corps force structure and operations during the Global War on Terrorism with a focus on conducting expeditionary operations. Limited changes to Marine Corps structure have allowed the Marine Corps to maintain their vision of employing a Marine Air-Ground Task Force as the preferred method to support limited land combat operations. Along with a summary of Marine Corps operations since 2001, the chapter highlights the 22nd MEU(SOC) support to Operation Mountain Storm in 2004, from deployment to operations to the aftermath of the failure to provide follow-on forces to reinforce the unit's successes.