We absolutely do not know enough to make any assumptions. We don’t even know if the OP’s parents are US citizens.
I assure you that it is very possible not to be a state resident when you are an expat. I was in that situation and know plenty of others in the same. It’s also possible to remain a state resident. Military are pretty much forced to do so, and regulations are easier for them. A lot of the time for civilians, it’s a matter of not paying state income tax. You can have residency for voting without maintaining residence for tax purposes.