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Star Fleet Marine Unit Organization
 
Star Fleet's Marine Units are comprised of, in order from largest to
smallest, the following: 
 
Divisions
Regiments
Battalions
Companies
Platoons/Batteries
Squads/Gun Crews
 
Outlined below are the recommended minimum staffing levels, command level,
and basic mission each of the units. 
 
Division
 
Comprised of a minimum of three regiments, with 5 regiments being the
recommended number, commanded by a Lt. Gen. or a Maj.Gen. The Division is
a totally, self-contained unit, answerable only to Star Fleet Command,
that includes logistic, supply and command support for itself and
subordinate units. The overall mission of a division can be diverse, and
often is fragmented out to various specialized units within the division. 
 
Unit designation: x Division or xDIV (where x equals a number.)
 
Regiment
 
Is the largest of the specialized units, comprised of a minimum of two
battalions, with 3-5 battalions being the recommended number, commanded by
a Brig.Gen. or Colonel. Regiments usually will have a specialized mission,
i.e., Ground Combat, Artillery, Air Assault, etc. Although the overall
mission is specialized, it is not unusual to see a mix of units in one
regiment, i.e., an artillery battalion or company in a ground combat
regiment. 
 
Unit Designation: xDIV, yARTY or xDIV, yREG or x Division, y Artillery
Regiment. (Where y equals a named number of the regiment, i.e., first,
second, etc.) 
 
Each unit will be named in the order that they were created, of that type,
or to replace a vacant unit in the superior organization. Example: A new
ground combat regiment is formed in a division with three such units.
Therefore, the new unit is the Fourth Regiment. Also, a new artillery
regiment that is formed in a division that has an artillery regiment and
multiple ground combat units, would be the Second Artillery Regiment. 
 
(Note: Unless specified by a specialty designator, a regiment, battalion,
or company is ground combat forces.)
 
Battalion
 
Is the largest unit assigned to Starships, comprised of a minimum of three
companies, one of which may be a slightly smaller company serving as a
Headquarters Company, with the recommended number being 4-6 companies,
commanded by a Major or Lt. Colonel. Battalions are usually more
homogeneous in relation to their mission, although it is not unknown for
ground combat units to be assigned to artillery units for support. 
 
Unit Designation: xDIV, yREG, yBN or x Division, y Regiment, y Battalion. 
 
Naming conventions for battalions are the same as for regiments.
 
Company
 
The smallest unit capable of independent action, comprised of a minimum of
2 platoons, with the recommended number being 3-4 platoons, commanded by a
1st Lieutenant or Liutenant Major. Companies are usually made up of
specialized platoons and squads. 

Unit Designation: x DIV, yREG, yBN, CO z or x Division, y Regiment, w
Company. 
 
Where z equals a letter in the Roman Alphabet and w equals a letter in the
Phonetic Alphabet, i.e., Able, Baker, etc. Exception: Companies serving as
Battalion HQ Companies are designated as follows: xDIV, yREG, yBN, HQ CO.
or xDivision, yRegiment, yBattalion, Headquarters Company. 
 
Platoon/Battery
 
Smallest field command, comprised of a minimum of 4 six man squads,
commanded by a 2nd or 1st Lieutenant, assisted by a Platoon Leader
(Gunnery Sgt.). Three of the squads will be "Rifleman" squads with the
fourth being a Heavy/Special Weapons squad. The Heavy/Special Weapons
Squads also encompass demolition. 
 
A battery is the artillery version of the platoon made up of a minimum of
4 six man gun crews, commanded by a 2nd or 1st Lieutenant, assisted by a
Chief Gunner. There is no equivalent to the Heavy/Special Weapons squad in
the battery. 
 
Squad/Gun Crew
 
Made up of a minimum of six men. The squad is lead by a Sgt. or Corporal
as a Squad Leader and a Corporal or senior PFC as Asst. Squad Leader. The
remainder of the squad is made up of Pvt.'s and PFC's serving as
"Riflemen". 
 
The Gun Crew is the Artillery version of the Squad, comprising the same
numbers and lead by a Sgt. or Corp. as Gun Captain and a Corp or PFC as a
Gunner's Mate. The rest of the Gun Crew is comprised of Pvt's and PFC's
who serve as Gunner/Loader's. 

Ranking system as practiced in SF:

Commissioned Officers

Grade   Naval Rank                              Marine Rank
O-1	Ensign (Esn./Ens.)			Second Lieutenant (2LT)
O-2	Lieutenant, junior grade (Lt(jg).)	First Lieutenant (1LT)
O-3 	Lieutenant (Lt.)			Lieutenant-Major (L-Maj)
O-4	Lieutenant Commander (LCdr./LtCmdr.)	Major (Maj)
O-5	Commander (Cdr./Cmdr.)			Lieutenant Colonel (LCol)
O-6	Captain (Capt.)				Colonel (Col)

Both the naval and marine ranks follow the U.S. navy with one noted
exception.  The marine rank of O-3 is 'Lieutenant-Major' rather the
USMC rank of 'Captain.' (Cpt.)  Basically, this is to get around the 
'honorary' rank of 'Major' to said marines while on naval vessels, 
which is done to avoid confusion with the naval Captain of the ship.
In other words, we are skirting the problem altogether with the 
'L-Maj' rank.

Enlisted Crewmen

Grade           Naval Rank                      Marine Rank
E-1		Crewman Recruit			Private
E-2		Crewman (Yeoman)		Private First Class
E-3		Crewman First Class		Lance Corporal
E-4		Specialist			Corporal
E-5		Petty Officer			Sergeant
E-6		Chief Petty Officer		Gunnery Sergeant
E-7		Master Chief Petty Officer	Master Sergeant
E-8		Sr. Chief Petty Officer		Sergeant-Major

It does not mirror the USN or USMC exactly and it completely ingores the
system of 'rates.'

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    Source: geocities.com/~holoworldfleet/documents

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