...why were his orders rescinded..?
Because he volunteered for overseas service. His remedy was to unvolunteer. The government recognized that and rescinded his orders. He has no remedy in court. Orly is not a good lawyer.
His remedy was to unvolunteer.
When orders are issued, the soldier cannot "unvolunteer." The government makes the decision, not the individual soldier.
Or, maybe I didn't understand your post.
5.56mm