I don't know the answer to that. I have met a few who stayed in 30 years who never went back to work, but I can't remember anyone who only stayed 20, and never got another job. You know, from about year 10 on, military people constantly talk retirement, but it's from their current status, not permanently
I never thought of EVER retiring, much less early retiring. This board is an eye-opener to me, that people in their 20s and 30s would be thinking of retiring. It puts a whole different light on saving and planning. I just thought you would roll up and die, if you retired. Turns out I was wrong, and I'm happy I walked. With planning, I could have quit at 55.
Military retirees who have traveled the world could retire anywhere. They know they can live and make do because they have done it, albeit with the support system of the commissary and the base hospital, etc. Thailand, Korea, Southern Spain, South America, all of these places with a lower cost of living are just made for the military retiree.
BYW: While you were in Thailand, did you run into any Vietnam Vets who just never left; stayed in Bangkok or wherever. They must be a motley looking bunch by now.