The 5thRegiment consist of one headquarters company and four infantry battalions, one of which is deployed outside the continental United States at all times.
The infantry battalions are the basic tactical units that the regiment accomplishes its mission of locating, closing with and destroying the enemy by fire and close combat.
The 5thMarineRegiment was activated at Philadelphia, Penn as the 5thRegiment of the Marines.
The division's regiments were in existence as early as March 8, 1911, when the 1st MarineRegiment was formed at Guantanamo Bay, Cuba.
U.S. Marine involvement in Operation Restore Hope officially ended April 27, 1993, when the humanitarian relief sector of Mogadishu was handed over to Pakistani forces.
The 1st Marine Division, then under the command of MajGen James Mattis, was one of the two major U.S. land forces that participated in the initial invasion of Iraq in 2003.