Bill,

If I understand you right your 12 man squad has: an assault fire team, which I'm assuming to be riflemen and grenadiers; a support fire team, which would probably be MG based; and a C&C fire team that can go either way. That's an interesting take on it and one I've never heard before. It occurs to me that a designated marksman would combine well with an MG team to make up the support fire team.

It also occurs to me that we could have this squad now by breaking up the current weapons squad and distributing them into the three rifle squads. It's still 36 men either way.

About your proposed 15 man ODA. I think a WWII era OSS Operational Group was 15 men.