Uniformed Service personnel and their family members must meet a state's residency requirements to declare it as their legal voting residence. You must have had physical presence in the state with the intent to remain or make the state your home or domicile.
You may only have one single legal residence at a time. You may change residency each time you transfer to a new location if you make a conscious decision to change residency:
Certain specific actions on your part may be interpreted as conscious decisions, e.g., registering to vote, registering a car, qualifying for in-state tuition, obtaining a driver's license, etc. Once your legal voting residence is changed, you may not revert to the previous residence address for voting without re-establishing physical presence and the intent to remain or return.
"Home of Record" is the address that you, as a military member, had upon entry into the Service and does not change.
Home of Record is not necessarily your legal voting residence, but they may be the same if you did not establish a legal voting residence elsewhere after entering on active duty.
If you, as a military member change your legal voting residence after entering on active duty, you may not revert to claiming the "Home of Record" as legal voting residence without re-establishing physical presence and intent to remain in or return to that state.
Voting age family members of active duty military personnel may each have a different legal residence. A spouse does not automatically assume the legal residence of the active duty member upon marriage.
Each individual must meet the physical presence and intent to remain or return criteria. Minors typically assume the legal residence of either parent when they become 18. They also have the option of establishing their own legal residence which can be different from either parent, assuming they have met the guidelines of physical presence and intent to remain or return.