We used the concept on Arekans server and I made a few observations.
1. Use combat sparingly. It becomes a massive confusion and it's annoying to try and run a military server when there's stuff going on.
2. Keep the same players on the server for as long as possible. The more familiar people you have, the better. The more new people that come in and forget everything up, well, it forgets up.
3. We probably could've spent more time setting stuff up.
All in all it was pretty fun. I was the Squad leader, so I pretty much was in control of everybody except Arekan. We did patrols, and the RP seemed to be intelligent and successful until the end, when a bunch of new guys joined, got bored and started shooting everything.
We're going to try it again tomorrow and try to incorporate these ideas.