from the Congressional Budget Office
For the first time in nearly two decades, the Department of Defense (DoD) has experienced sustained budget cuts in recent years: Annual appropriations (excluding additional appropriations for ongoing military operations) for 2013 through 2016 averaged about 5 percent less, in nominal terms, than the funding in 2012.
The possible need to accommodate constraints on DoD's budget in the future - because of caps on discretionary spending through 2021 enacted in the Budget Control Act of 2011, as amended - raises the question of how best to prioritize the various tasks that the department performs and how best to assess any proposed changes to the force. At the same time, the enormous size and complexity of DoD, the many specialized organizations it includes, the wide array of weapon systems and platforms it operates, and the complexity of its budget documents make the task of understanding how the department operates - and how its budget could be changed - daunting to many observers.