In 1966, a military recruiter lied to me. I spent six years in uniform resenting it. It is discrimination. Killing people, even for a good cause, is not an adventure. Read the fine print on the enlistment agreement.
Nothing is guaranteed.
Travel is possible and much more enjoyable as a civilian. Many overseas assignments are hellholes, and the local people regard foreign troops in their midst as either a plague or a bunch of suckers. I've been there. Your training will very likely be worthless. Think about it.