In the military you can change your state of legal residence to any state you reside in, and maintain it there even if you move to another state or overseas. Thus most military members change their legal residence permanently to states with no income tax and maintain it there if they get the chance.
Also, military members driver's licences don't expire when stationed out of their home state as long as they are on active duty.
When assigned to Florida from California, my first stop off of the redeye was at the DMV to surrender my Cali driver's license, and pick up one from my new home state, thus establishing residence. Was reassigned a few times, then retired, with my Florida license good for another 60 days or so.
Applied for a new California license and was refused. Had 3 outstanding tickets in Oakland, all at a time I was overseas. No seat belt, driving without a license, and failure to appear. All attached to my Cali licence which had been surrendered to Florida 10 years prior. On the phone with the Alameda County Court was told it must be me because it was the same first, middle, and last name, and same birthdate. I remarked some rocket surgeon of a clerk must have made the link from a database. Was told I would have to travel there and straighten it out, didn't matter I had no Cali driver's licence, and was in the military overseas when the incident occurred.
Finally got them to send me a copy of the ticket. Turned out my doppelganger was black and I'm not. Was able to straighten it out by sending a copy of my military ID with my picture. Fortunately the chief clerk wasn't as stupid as those who worked for him.
Civil service clerks can be dangerous when using databases.