Quote Originally Posted by cmacq
Right, in the post-civil war american southwest a troop/cav. company had only 45 men and horse. No mater what the numbers I call it relevance...

as all modern armies are indeed based on the basic roman system. That is as much a fact as ever there was.
Not really, the Roman army we are talking about had utterly collapsed and modern armies more closely resemble the much later armies of the Late Empire. The gulf of some 1000 years between the end of the Western Empire and the rise of properly organised armies with regiments means there's no direct connection.

In any case the maniple was not a significant unit in the post Marian legion, the century and the cohort were.

My point remains the same though, the terms don't map so don't try to force them to fit because it doesn't work. Just learn how the system worked and don't try to dumb it down.