Army of One? Out of the total military budgets of all the worlds nations The U.S. Military spends the most, 39%. China come in second at 9.5%.
The combined total of the next thirteen is 33% (as per SIPRI Military Expenditure database, 2013). North America (which includes Mexico and Canada spends 691 Billion the rest of the world combined spends 1.042 Trillion.
That's everybody except the U.S. Canada and Mexico (according to the Stockholm International Peace Research Institute). I don't know about you but that's one big Army of One.