The Pentagon spends nearly $900 billion a year, more than most other leading nations combined. So where does all that money go? Who decides what to spend it on? How are Congress, the President, Defense Contractors and Lobbyists involved? And what even is the difference between an Authorization and an Appropriation.

https://comptroller.defense.gov/Budget-Materials/

https://sgp.fas.org/crs/natsec/IF10618.pdf

https://crsreports.congress.gov/product/pdf/IN/IN12324/2