Free education, free healthcare, discounts all over the place, better insurance premiums.
Now theres a new 9/11 gi bill, pretty sweat if you have over 3 years active duty. The one used to start out at $250 a month to pay for tution/books and everything else. you can get the same or better deal by being poor, scholarships, grants, work studies and so on.
Health insurance, you need to be retired or over 6 years active, become disabled while in the line of duty. Most people don't qualify for it. Again you can get better coverage by being poor or through your job.
Car insurance, you can get the same rates or better by shooping around.
Discounts, clip coupons... look for online deals. Ask for it