I never said we should not have a military, that was your initial strawman until you drew inferences that Russia and China would invade us based on the possibility of their having more troops or weapons. Spending half a trillion to a trillion annually was always unreasonable and created a pretext for unnecessary deployments and occupations.
It isn't used for anything, it is cut. Social Security and Health Care are the top two expenditures. Defense is third. You can parse things different ways to change the outcomes of course, like carving out medicare but leaving the entire defense budget as one item. Alternatively, if you chop up the defense budget to Army, Navy, NASA, CIA, Homeland Security, etc., none of them are in the top three. Your own numbers that you have posted several times show that is not the case. Payroll taxes $1.1 trillion, SS and medicare, $1.4 trillion that means those two programs are running a $300 billion deficit. All of it creates debt in the aggregate. Labelling a tax on income something else and nominally directing it to pay for a particular program (but not really, there is no lockbox), in order to ignore the expense of that program can be used for any item in the budget. Call 10% of income the Military Tax, then the military is debt neutral, even though neither revenue nor spending changed.