There should definitely be a combat knife forum (meaning mainly a soldier's knife that is at least capable of fighting), focussed on the knives themselves, their history and their design. And I don't mean strictly issue knives, since so many are private purchase...
Prac Tac is mostly about defense/fighting, and who thinks they know best about that... Since the actual experience of knife fighting is, shall we say, rather limited, a forum more oriented towards the military-carried knives themselves would be welcome...
Gaston