Impact of Increased Troops in Afghanistan

Numerous theories abound about how the addition of 30,000 new troops to Afghanistan will effect the economy next year. Aside from the fact that we are sending all these people into a terrible environment and risking too many lives, I have doubts about bolstering the economy. There has been no significant talk about needing new aircraft or naval vessels, communications systems or computer networks, etc. The only thing it might do is take some of the unemployed off the roles filling temporary holes when reservists get called into action. The price we will likely pay in fatalities seems too high based on all other conditions. Sincerely, I hope I am wrong.