The 2011 military budget, by the way, is the largest in history, not just in actual dollars, but in inflation adjusted dollars, exceeding even the spending in World War II, when the nation was on an all-out military footing.
…the military share of the (US) budget works out to about $1.6 trillion.
US military spending isn’t just half of the US budget. It is also half of the entire global spending on war and weaponry.
America and its friends and allies account for more than two-thirds of all military spending worldwide.
Meanwhile Iran, which the White House and Congress are portraying as America’s arch enemy despite its not having invaded another country in hundreds of years, isn’t even on the list of the top 17 military big-spenders. Iran’s current military budget is a teensy $4.8 billion, about the same as the estimated $5 billion spent on the military by North Korea–America’s other "major enemy."