In those days you could, as a GI, which I was in the service, you could wear your uniform and get a free flight on any other branch of the service. (businessinsider.com)
If you get down into specifics, meaning branches of services and jobs within those branches, you'll find even more perks. (financialsamurai.com)
And irrespective of the specific branch of service, decide early if you want to pursue the military lawyer route. (lawyerist.com)