True, but reserve troops can only be involuntarily mobilized for 24 months out of any given 60 month period (absent a declaration of war). As many NG units (or individual NG soldiers as fillers in other units) have already been mobilized for 18 months or so to Iraq or Afghanistan, where are these NG troops going to come from?
I have already done two 15 month mobilizations (and I got $1000 a month bonus pay for volunteering to go over 24 months and that bonus is only available overseas), so I can't go again unless I volunteer (not going to happen-already spent too much time away from my wife).