U.S. military spending – Dept. of Defense plus nuclear weapons (in $billions) – is equal to the military spending of the next 15 countries combined.
These numbers show military expenditures for each country. Some say that U.S. military spending will naturally be higher because it has the highest Gross Domestic Product (GDP) of any country. The United States accounts for 47 percent of the world’s total military spending, however the U.S.’s share of the world’s GDP is about 21 percent. Also note that of the top 15 countries shown, at least 12 are considered allies of the U.S. The U.S. outspends Iran and North Korea by a ratio of 72 to one.
Source: Center for Arms Control and Non-Proliferation, http://old.armscontrolcenter.org/archives/002279.php; our graph uses a more comparable figure of $515 from actual 2006 U.S. military spending