IVIaedhros:

As IntelTrooper suggested, this sounds an awful lot like the Mobile (Roving?) Combined Action Platoons from Vietnam, which is good.

I don't if I can express this question clearly, but I'll try. How much of an emphasis would your proposed unit put on pursuit? And if they were going to pursue for more than a few hours, how would they lighten their load? Body armor or no? etc.

There is a long thread about lightening the load.