Just give up, maxed out doesn't mean not a sole to spare it means we don't need any other fights.
Do you even read the news? as Iraq draws down Afghanistan gets more troops. put 5 marbles in each hand, take two from one hand and place them in the other, now you have more marbles in one hand right? 7 in one and 3 in the other. call the hand with 7 marbles Afghanistan and you'll then understand how we get more troops there when we're maxed out.