Who has physical custody of the child while dad is in bootcamp? If mom does, she is entitled to file for support even while he is in bootcamp.
If you had given all the information in your original question, jurisdiction might be determined, because it is different with the fact that the father is in the military.
Please answer the following questions:
What county granted your husband sole custody & when?
What county is his permenant residence as per the military?
In what county was the subsequent child support order petitioned and when?
With whom does the child reside during basic and and visitation? When?
Where is he in basic?
Have you called JAG?
Look up SSCRA.