DoD Instruction 7000.14-R (https://comptroller.defense.gov/Portals/45/documents/fmr/Volume_11a.pdf https://comptroller.defense.gov/Portals/45/documents/fmr/Vol.

DoD Instruction 7000.14-R (https://comptroller.defense.gov/Portals/45/documents/fmr/Volume_11a.pdf https://comptroller.defense.gov/Portals/45/documents/fmr/Vol... is a good start) Overseas Contingency Operations - https://www.cbo.gov/system/files?file=2018-10/54219-oco_spending.pdf https://www.cbo.gov/system/files?file=2018-10/54219-oco_spen... Nonappropriated funds (MWR, etc.) - https://comptroller.defense.gov/Portals/45/documents/fmr/archive/13arch/13_01_Sep08.pdf https://comptroller.defense.gov/Portals/45/documents/fmr/arc... Foreign military sales / FMS - https://en.wikipedia.org/wiki/Foreign_Military_Sales https://en.wikipedia.org/wiki/Foreign_Military_Sales.