Okay.
Government stops buying miltiary hardware, cars, computers, and all the other things they get from private industry. It also withdraws all the accounts of government employees from private sector banks and financial institutions..such as IRAs and 401ks.
What do you think happens the very next day?
Jobs get created???
You forgot a step. Government confiscates money from the private sector, then buys the things you say from the private sector for purposes creating no economic value. If you own a store and I take money out of your cash register and buy your stuff, are you going to hire people to serve me better? So yes, if they stop doing that then it would dramatically improve the economy.
Military is a red herring here. Demonstrate you don't grasp the discussion by going to why we have a military and not the economic impact of military spending. Military is analogous to insurance. It makes you poorer but protects what you have. But no, military spending doesn't create jobs.