Army Data Show Constraints on Troop Increase Potential
Escalation in Afghanistan Could Leave Few Brigades in Reserve

The shortage of available combat brigades means that an escalation of between 30,000 and 40,000 troops is “not realistic,” said Lawrence Korb, a former senior Pentagon official in the Reagan administration who now studies defense issues for the liberal Center for American Progress. To send practically all available soldiers into one of the two wars would leave the U.S. with “no reserve in case you had a problem in Korea.”

Interesting article with details about where troops could come from, etc.