What if the other parent is in the military and prevents scheduled visitation?

Let’s say that the former spouse is in the military and overseas with the children and she refuses to return them to the civilian husband when it is his time for visitation.

A Department of Defense directive, which has the force of law, requires service members, civilian military employees, and their family members who are outside the United States to comply with court orders requiring the return of minor children who are subject to a court order on custody or visitation.