Unlike commercial arms sales paid for by the buyer, FMF grants are funded by U.S. taxpayers, making them a direct federal expenditure subject to budget debates.
U.S. government money given to allies so they can buy American weapons and military training, rather than paying out of their own budgets.
Grant funding can help partners place orders faster and in larger quantities, which supporters say is critical given the multibillion-dollar backlog of undelivered arms to Taiwan.
Granting FMF, historically reserved for treaty allies like Israel and Egypt, signals a deeper U.S. security commitment and can provoke reactions from rival powers.
Congress appropriates FMF funds each year and can earmark amounts for specific recipients through authorization and appropriations bills.
The State Department oversees FMF policy while the Defense Department's Defense Security Cooperation Agency manages contracts and delivery of equipment.
The recipient government uses the U.S.-provided funds to buy approved American defense articles, services or training, with U.S. agencies monitoring end use.
A look at the laws, dollars and strategic questions behind U.S. arms support for Taiwan.
Read the guide →Lawmakers and analysts are divided over whether Washington should expand arms transfers and security assistance to the self-governed island.
Read the brief →