21st Century US Marine Unit Organization & Manuals

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Miscellaneous Documents with Organizational Info
Title	Date	Remarks
II MEFO 3100.3E, Standard Operating Procedures (SOP) for Marine Expeditionary Units (MEUs), Commanding General II MEF	11 May 2018	Includes detailed troop lists for reinforcing or augmenting units on a MEU, but not the T/O of units kept complete (MEU Command Element, Infantry Battalion, Marine Medium Tiltrotor Squadron, and Combat Logistics Battalion). This is because for those units the T/O would be referenced. For example, the Infantry Battalion is not included (except for total personnel figures) but its attached LAR Platoon (Reinforced) is. The Marine Medium Tiltrotor Squadron (VMM) isn't, but the Marine Attack Squadron (VMA) is.
Marine Air-Ground Task Forces	24 Feb 2022	A detailed document that talks about the organization and role of the MAGTF, with a focus on the Marine Expeditionary Unit (MEU). Information is relatively modern, with even some reference to tentative 2030 force structure.
I MEFO P5440.5B, Standing Operating Procedures (SOP) for the Southern California (SOCAL) Deployed Marine Expeditionary Unit (Special Operations Capable) (MEU(SOC)), Commanding General I MEF	29 Apr 2002
Draft, Joint Strike Fighter (JSF) System Training Plan (STP)	1 Oct 2001	Pages 70 to 98 includes Troop Lists for notional JSF (F-35) squadrons, including 12-, 20- and 40-aircraft variants based on the T/O of F/A-18 and AV-8B squadrons at the time.
The Commander’s Amphibious Warfare Handbook	Oct 2016

Tables of Organization

1999 Tables of Organization (T/O) hosted by Global Security and archived. Note that because the U.S. Marine Corps operates with separate Tables of Organization (T/O) and Tables of Equipment (T/E) these don't include equipment.