Is there any real-world equivalent to this "inactivation/reactivation of commission" thing?
Timo Saloniemi
In the 17th and 18th centuries, the Royal Navy (and several others, iirc) would often put officers on 'half pay' and beach them when there wasn't a position open on a ship. They'd basically be free to do whatever they want until recalled, including taking positions elsewhere. Of course, this often wasn't voluntary but because the Navy was downsizing at the moment and the officer in question didn't have enough friends in high places to get a paying posting.