And for the really nerdy among us...
The Brigade of Midshipmen is limited to 4,400, which gives you four (4) average class sizes of 1,100 Midshipmen, each. The Brigade is then divided into two (2) Regiments of 2,200 Midshipmen each. Each of these Regiments is further divided into six (6) Battalions of five (5) Companies each. Each Company has roughly 140 to 150 Midshipmen in it. Therefore, there are thirty Companies in the Brigade. See below for a more graphic representation (Companies are designated by a "C").
BRIGADE
1st Regiment
1st Battalion-------2nd Battalion------3rd Battalion
1C 2C 3C 4C 5C---6C 7C 8C 9C 10C---11C 12C 13C 14C 15C
2nd Regiment
4th Battalion--------------5th Battalion------------------6th Battalion
16C 17C 18C 19C 20C----21C 22C 23C 24C 25C--------26C 27C 28C 29C 30C
The 30 Companies are further broken down into Platoons, Squads, and Fire Teams. Typically, there are four (4) Platoons in each Company, comprised of three (3) Squads, which contain the smallest unit, called a Fire Team. Typically, a Fire Team is comprised of four (4) Midshipmen. A Squad is composed of one (1) Squad Leader and three (3) Fire Teams. See below for a more graphic representation (Fire Teams are designated by "FT").
1st Platoon
1st Squad--------------2nd Squad---------------3rd Squad
Squad Leader---------Squad Leader-----------Squad Leader
FT1 FT2 FT3 -----------FT1 FT2 FT3 -------------FT1 FT2 FT3
2nd Platoon
1st Squad--------------2nd Squad---------------3rd Squad
Squad Leader---------Squad Leader-----------Squad Leader
FT1 FT2 FT3 -----------FT1 FT2 FT3 -------------FT1 FT2 FT3
3rd Platoon
1st Squad--------------2nd Squad---------------3rd Squad
Squad Leader---------Squad Leader-----------Squad Leader
FT1 FT2 FT3 -----------FT1 FT2 FT3 -------------FT1 FT2 FT3
4th Platoon
1st Squad--------------2nd Squad--------------3rd Squad
Squad Leader---------Squad Leader-----------Squad Leader
FT1 FT2 FT3 -----------FT1 FT2 FT3 -------------FT1 FT2 FT3