Two Fireteams (4-5 men)to a Squad(10 men, Plus Squad Leader
. Two Squads to a Section.(22 men Plus Section leader.
Three Sections to a Platoon.(69 men, Plus Platoon Leader and Lt.
Three Platoons to a Company (May have been 4 if "Company" HQ/Supply is added).
4 Companies to a Battalion. (may be 5 if Batalion HQ/Supply was considered seperate entitites)
4 Battalions to a Regiment. Then the Regiment also had it's HQ/Supply chain, not to mention Motor Pool as well.This is excluding any arty attachments or light/heavy attachments.
Honestly, I can't recall how many Regiments made up the First Mar Div. I was with First Marines at the time (Not Division, Regiment)
Hasn't the 1st Mar Div traditionally (since WW2) been composed of the 1st, 5th & 7th Marine Regiments?