The military budget of the United States during FY 2018 was approximately $622 billion in expenses for the Department of Defense (DoD) or 3.1% GDP. Defense spending has been falling relative to GDP over the past few decades, from 5.6% GDP in the 1980s, to 3.9% in the 1990s, and 3.7% in the 2000s. CBO has reported numerous options for reducing defense spending, many of which deal with canceling development and production of various defense programs:
