The US military budget is only 14% under a very narrow definition. If a US Navy sailor is off the coast of Yemen, in "defense" of the US bombing Yemen so as to support the offensive in Gaza, and the sailor is maimed and flown back to the US - their medical bills are no longer coming out of the "defense" budget but out of the "entitlement" budget (or if not then the everything else budget).
Also interest did not come out of nowhere, we're paying interest on past military etc. spending, and have a deficit to overextend current military spending which we will be paying interest on.
So if we narrowly define "defense" spending and hand wave spending on veteran's benefits, interest on past military spending etc. it is shrunk to 14% of spending, but it is not 14% of spending.
I know this is how the government presents its spending numbers but it is done so to hide the true cost of the "defense" budget.