from Wikipedia, but you certainly can find other current docs for proof:
Quote:
The 2009 U.S. military budget accounts for approximately 40% of global arms spending and is over six times larger than the military budget of China (compared at the nominal US dollar / Renminbi rate, not the PPP rate). The United States and its close allies are responsible for two-thirds to three-quarters of the world's military spending (of which, in turn, the U.S. is responsible for the majority).[30][31][32]
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