I believe I can as I have a child in that position who has a law degree; my PhD spouse and child have far fewer options and they are not location limited as is my other child. When the numbers of jobs in the country for a specific field requiring a PhD are likely many fewer than a thousand and likely fewer than a hundred. Military bases also can be in remote locations or a foreign country. Of course, the military member can be a geo bachelor while the spouse can remain in her work location.