I am lost as to where your description of what IS ends, and your proposal of what SHOULD BE begins.

Quote Originally Posted by novelist View Post
The fire team is the basic building block of the squad. Army has two, Marines have three.
Yes, this is true. And both US services have a separate squad leader (which is NOT universal- the section leader in most Commonwealth armies is also the leader of one of the fire teams).

Quote Originally Posted by novelist View Post
In terms of the Bradley Platoon, it varies. The M2-A2 has a four 3-man crews (x4 vehicles) and carries 6-men per vehicle. This gives the platoon a total strength of x 36. With the A3 Bradley, it is basically the same, except that an extra man has been added, 7-men per vehicle which gives you a x 40 man platoon. The vehicle space doesn't actually support x 3 squads, only two with an additional 5-man team to serve as the platoon Base of Fire.
The Bradley-based mechanized infantry platoon HAS VARIED- there is only one standard US Army organization, and it was NOT based on the variant (as far as I know). Originally (early-mid 80s), the Bradley was part of the infantry squad, which was 9 men- 3 vehicle crew and 6 as part of the "dismount team". The platoon had 3 squads (27) plus a headquarters that consisted of PL, PSG, gunner, driver and RTO (32 total in the platoon, 12 vehicle crew and 20 "dismounts"= there may have been a "jump gunner" to allow both PL and PSG to dismount, but I'm not sure). This didn't last very long, and the decision was made to formally split the dismount element from the vehicle crews. The vehicle crews have remained 3/vehicle, but the dismounted element has changed. Initially, the 18 dismounts (after PL & RTO) were organized as 2 x 9-man squads (standard Army squads with SL + 2 x 4-man fire teams). Then, a 5-man (SL + 2 x 2-man MG team) weapons squad was added. Then, the change to the current organization of 3 x 9-man rifle squads was made in the early 00s. And, yes, there is a seating issue, no matter the model, with 27 men in rifle squads, plus PL, RTO, medic and FO (31) in 4 Bradleys.

Why do you need a dismounted "platoon Base of Fire" when you have 4 Bradleys with stabilized 25mm cannon, M240 co-ax MGs and TOW launchers? Dismounting 2 x M240s doesn't seem to bring much to the table.

Quote Originally Posted by novelist View Post
The platoon FO is an important part of the unit as he is the primary shooter for the mechanized infantry.
Yes and no- in fact, we didn't have platoons FOs in the mech infantry for a while because we used the spaces to fill additional COLT teams in the BDE. They are back now, but I think that their utility is limited. They are useful during dismounted operations, but limited during mounted operations. None of the platoon's Bradleys have a radio to support the Fires net, nor do they have a seat where the FO can see (unless you put him in the turret, which takes a member of the crew out of the direct fire fight). I think that we would be much better off to centralize the 36 platoon FOs in the Armor BCT (2/PLT x 3 PLTs/CO x 6 COs/BCT) and mount them in M7 BFISTs or M1200 Knights and provide the BCT CDR with 9 x 4-man mounted observer teams that he can task organize as required (in addition to the 12 x CO FISTs he already has to habitually associate with each company).

Quote Originally Posted by novelist View Post
In a tank-heavy combined arms company task force, there's only going to be one Bradley Platoon and two Tank Platoons, so the larger x 40-man platoon is more conducive to infantry support for the tanks. a x 45-man platoon is good, in my humble opinion.
Where did you get 45 men per platoon?

Quote Originally Posted by novelist View Post
Standard Rifle Platoons used to carry x 46-men. Now, in terms of standard infantry platoons with x 3 rifle squads and x 1 weapons squad, or x 36-men you add a platoon HQ's with the PL, PSG, RTO, x 2 FO' s, a medic, and x 4 engineers (to be attached to each squad) you get x 46-men. This gives you the wpns squad as a Base of Fire, two maneuver squads with an engineer/demo expert for breaching tasks, the platoon HQ's and a squad in tactical reserve providing security for the PHQ. Anything less will degrade the overall combat effectiveness and fire capability of the standard infantry platoon. There is no difference between this platoon and the Airborne except that one is jump certified and the other isn't.
Where did this organization come from? Is this your proposal?

Since 1993 (when I started hanging around the Army), the Airborne Infantry platoon has been the same- PL HQs with PL, PSG & RTO, with habitual attachments of a 2-man FO party and a medic; 3 x 9-man rifle squads as described above; and a 9-man weapons squad, with SL, 2 x MG, 2 x MG/AG, 2 x AT (Dragon, later Javelin) and 2 x AT/AB. The were earlier permutations, including a 10-man squad (with imbalanced fire teams, 1 x 4-man and 1 x 5-man, plus SL), and the weapons squad has varied. There have never, AFAIK, been Engineers organic to the Airborne Infantry platoon, although a squad or team from the brigade's habitual Engineer company could be task organized.

Quote Originally Posted by novelist View Post
In terms of (non-Stryker) Light Infantry Platoons, you have a 9-man platoon HQ and three 9-man squads, which gives you a total strength of x 36. But "light fighters" are "infiltrators," so their mission task is not exactly to close with, capture, kill, or destroy the enemy by means of fire and maneuver like the standard or mechanized infantry. If we're talking light infantry, the smaller platoon is more desirable. Standard Infantry needs a larger platoon. Forty (40) men is not too big. It's a basic platoon organizational structure.
The Light Infantry Division (not ABN/AASLT) that existed from 1984(ish) through 2005/2006 had 3 x 9-man rifle squads, 2 x 2-man MG teams and a PLT HQs with PL, PSG, RTO (34 total, with the habitual attachment of a 2-man FO party and a medic). The AT gunners were in a 13-man section in the company (Section leader + 6 x 2-man teams of AT and AT/AB)- the only difference between this organization and the ABN/AASLT was 2 NCOs (3 weapons squad leaders vs 1 AT section leader). Since 2005, the platoons in all Infantry Brigade Combat Teams (IBCTs) have been identical, following the ABN/AASLT organization described above- there is no more distinction between Light and ABN/AASLT.

Strykers are organized differently, but similarly to the Bradley, platoons. Strykers have 3 x 9-man squads, a weapons squad (which I have seen as variously 5 or 7 men), a PLT HQs and a vehicle section. Originally (99-00) the FO was organic, but I think we've fixed that, and there is always an habitual medic. I believe that the vehicle section is only 7 pax, because the PL and PSG are both vehicle commanders, but only one "jump VC" is provided, but I'm not sure. I am not as up on Stryker as I am on light (ABN/AASLT) and mech.

I disagree with your characterization of the mission of "light" infantry, but that is another discussion.

Quote Originally Posted by novelist View Post
With all due respect, I don't see how a Bradley Platoon can be larger than x 40-men without adding an extra vehicle. It's difficult to see four Bradley's carrying x 45-men. I can see it if it is equipped with the M-113, because the Gavin carries 11-men, the dvr, TC, and a 9-man squad for a total of x 44-men, (you could probably squeeze an extra man in).
So suddenly we are back to the mech platoon. I still don't see where you get 45 from- in my second paragraph, I showed you 31 dismounts (+ 12 vehicle crew) for 43. We know that there are only 7 seats/Bradley (x 4 = 28 in the platoon) for dismounts, so there are 3 personnel too many. I don't think there is an official solution for this, since full platoons are so rare, as pointed about by someone not too long ago.

Sorry for the long reply.