newbies questions/first post, please don't shoot me !!

The AACWWiki stated, I Quote" If all of a state’s units are in play, the state can’t field more units until some are eliminated".(Fair enough)
Question: How fast is the recovery period ? meaning, if i build 10 out of 10 units lets say in Oregon, 2 of them dies, how longs(turn) does it take for me to be able to build those 2 units in Oregon again? Does NM play a role? is it possible to speed up the process (industries ? ).
Does industries help to incrase the amount of units produce per Region/State ?
Thanks for any reply
