Hey, so I just wanted to point out something that hasn't been mentioned up till now. There have been video games titled "Stronghold" such as:
https://en.wikipedia.org/wiki/Strong...001_video_game)
https://en.wikipedia.org/wiki/Strong...993_video_game)
I have played neither of these and thus know very little about them. I just want to throw these out there so that we don't get too caught up with the whole CTF idea.