COMMAR:

Carl asked a similar question, but re: SOF. Mine is directed to control of the local police and local militia.

Lt.Col. McBreen's Notes (pt. 7, p.3 pdf; my emphasis):

Each Marine was a combined leader. Marine riflemen were team leaders, Marine fire team leaders were squad leaders. The Marine squad leader commanded the CAP in combat. Westmoreland's order prohibiting US leaders from commanding Vietnamese troops was ignored.
How do you address the command structure re: the local security forces ?

Regards

Mike