While its subordinate battalions went to the Pacific Theater as part of the 5th Marine Division, the Regimental headquarters was disbanded while still in the United States.

[1] The regiment comprised two battalions and a headquarters and service company: The 16th Marines were inactivated on 25 May 1944 with the 5th Engineers and 5th Pioneers activated that same day.

[2] For the assault of Iwo Jima the 5th Marine Division created the 5th Shore Party Regiment with the Commanding Officer from the 16th Marines, Col Benjamin W. Gally as commander.

[3] The 5th Engineer Battalion was under Divisional control.

This United States Marine Corps article is a stub.