It has certainly been the law in the US and most western military for the longest time, go google vietnam era when the military was still using the rule to keep soldiers from marrying. If it's been overturned then it's still firm custom, the sheet issued to all the soldiers getting married at my first post even has it on their as a reminder. Anyway, even if it has changed - and I'd like to know when - it would still fall under something a commander could issue a directive over, it's traditional to talk with them and you other superiors about it, so they can ask you and maybe steer you away if your some 19 year old about to marry a girl you met last week. I'd also like you to cite for me when it became legal not inform the military you were married. I can show you without even citing regs that it is required. Certainly for security clearance which I'd be surprised if she didn't have - are you going to seriously tell me that marital status is irrelevant to security clearance even as we're discussing someone who was married to a fugitive and whose relationship is practically the hallmark for espionage via blackmail? Anyway, it's irrelevant, all soldiers fill out a DD 93, block 4 has marital status, you have to answer that truthfully or you committed a felony, I'm sure there are other forms too but there's no way in heck she didn't have to fill one of those out unless the marriage was very recent. The military didn't charge her with anything, she even got an honorable discharge, they could have literally beat her with the book if they wanted to. I think they acted very civilly about it.