Welcome Remco,
We must take account 2 very important parameters:
1. The Increase in the level of command with each new Theatre of Operations
2. Historical accuracy in each Theatre of Operations (concerning the units involved)
Based on these parameters I try to find the best type of unit to fit the platoon (or couple of platoons) force size.
For the moment (since this have to be in the early era of the conflict), I am trying to see how the "special forces" type may fit, in the type of cover operations combat.
This will be historically accurate and may still be playable due to the nature of operations.
Then, in the next Theatre of Operations No2 this platton may be attached to the new selection (company level).
What could be this selection? Could this selection (company) be a regular army company or could it be an airborne company?
In addition, the attachment of a lonely special forces platoon to this company command level won't harm the historical accuracy (on the contrary, I think this was a fact in the A SHAU valley).
In the third Theatre of operations the force connectivity issue will be more difficult. We should connect this (for example) Airborne Company to a Battalion (as attachment?).
But in the bottom line, my opinion is that we shouldn't sacrifice the gameplay part of the campaign for achieving a 100% historical accuracy.
What would happened if for example the core force was open (free)?
Don't worry my friend Remco, we will make several versions of this project.
Once the structure is complete (maps, coding, mission types etc...) any modification (even in the core force) won't be a problem.