Defense Budget Overview: Irreversible Implementation of the National Defense Strategy [open pdf - 8MB]
From the Document: "The DoD FY 2021 budget supports the irreversible implementation of the NDS [National Defense Strategy], which drives the Department's decision-making in reprioritizing resources and shifting investments to prepare for a potential future, high-end fight. [...] Based on the spending limits established in the Bipartisan Budget Act of 2019 (BBA 2019), the President's FY 2021 budget request for DoD is $705 billion. This budget represents a $0.8 billion increase over the FY 2020 enacted appropriation excluding natural disaster relief emergency funding. To live within the BBA 2019 agreement levels, the Department made tough choices and realigned resources to sustain and advance the recent gains in readiness and lethality."
U.S. Under Secretary of Defense (Comptroller): https://comptroller.defense.gov/