I can only come up with three ways to accomplish this given that our military is becoming increasingly battle weary. The first is obviously to have a draft. Not gonna happen with presidential approval ratings in the thirties. Members of Congress like being members of Congress and approving a draft puts you in the fast lane out of town. The second is recruit foreigners to replenish our ranks. Bad idea, leads to a clusterfuck of a military. The third, and in my opinion the best option is to play a high stakes game of chicken with the UN. Tell them to give us 150,000 troops next month or we are going home.
The first option was never politically viable, and given the current realities, the third isn't either. The Pentagon is, however now considering the second. From the Boston Globe:
The armed forces, already struggling to meet recruiting goals, are considering expanding the number of noncitizens in the ranks -- including disputed proposals to open recruiting stations overseas and putting more immigrants on a faster track to US citizenship if they volunteer -- according to Pentagon officials.
Foreign citizens serving in the US military is a highly charged issue, which could expose the Pentagon to criticism that it is essentially using mercenaries to defend the country. Other analysts voice concern that a large contingent of noncitizens under arms could jeopardize national security or reflect badly on Americans' willingness to serve in uniform.
The idea of signing up foreigners who are seeking US citizenship is gaining traction as a way to address a critical need for the Pentagon, while fully absorbing some of the roughly one million immigrants that enter the United States legally each year.
This is a bad idea. First of all, there are not going to be any overseas recruiting centers opened. Plain and simply put, those places could only be called one thing, targets. No, the only road this is going to lead to is the conscription of illegal aliens already in this country.