[USMC] || Officer Candidate School ||| #9877860

members (measured 21 Sept 2026, 23:21 UTC)

7 March 2021

created (per Roblox API)

10 August 2026

first measured by this register

Membership history

Growth

Growth history is still building. We hold one measurement for this entry. A trend needs at least two, taken days apart — so this will fill in on its own rather than being estimated. We do not publish numbers we have not measured.

Measurement log — every members count we have recorded
Measured (UTC)	Members	Change
1 Sept 2026, 05:51	1	first reading

Ownership

Owned by FatherUSA (@USA_altaccount) as measured.

Groups seen changing owner — the largest ever handed over and the most recent — are on the ownership transfers board.

Members we’ve seen

FatherUSA (@USA_altaccount) — [CJCS] Chairman of the Joint Chiefs of Staffs (rank 255)

A sample — only members this register has independently measured, highest rank first. Not the full roster.

Rank structure

[CJCS] Chairman of the Joint Chiefs of Staffs0

[OTCJCS] Office of the Chairman of the Joint Chiefs of Staffs | HICOM0

[CMC] Commandant of the Marine Corps0

[MS] Marine Corps Staff0

[CG] Commanding General0

[CS] Command Staff0

[CO] Commanding Officer0

[XO] Executive Officer0

[MGS] Master Gunnery Sergeant0

[CI] Chief Instructor0

[HI] Head Instructor0

[SI] Senior Instructor0

[I] Instructor0

[JI] Junior Instructor0

[AG] Awaiting Graduation0

[FE] Final Exam0

Phase Three | Inspection0

Member1

Guest0

Roles and per-rank member counts as Roblox reports them (rank 0 = guest … 255 = owner).

Related groups

Groups whose measured members overlap with this one — a sample from our membership graph.

[USN] ||| United States Navy |||#9519692 · 1 shared members

[USA] United States of America.....#9410551 · 1 shared members

[USMC] || Training and Education Command |||#9687492 · 1 shared members

[USAR] Military Police Corps [:]#10847092 · 1 shared members

The United States Marshal Services#13235252 · 1 shared members

[USAR] Army Special Operations Command [:]#10836153 · 1 shared members

[USMC] Marine Corps Sentries#9277568 · 1 shared members

[USMC] Marine Forces Special Operations Command.#8265592 · 1 shared members

[[USAR]] | United States Army ||#10406747 · 1 shared members

[USAR] Army Forces Command [:]#10836314 · 1 shared members

[USAR] Army Futures Command [:]#10838321 · 1 shared members

Open data

Download this group’s measured record — free to reuse with attribution: membership history (CSV) · full record (JSON)

Each file carries its licence and retrieval time inside it, and is generated from the same measurements shown above.