I was playing around with the Mediterranean Defense in Assassin's Creed: Revelations and ended up assigning one of my den masters to an assassin-controlled city.
I didn't actually want to go through with that, but I couldn't find a way to cancel the assignment. Even pressing "Back" just popped up a vague confirmation that turned out to mean "you will assign the assassin to this city if you choose to proceed".
So now I'm short an assassin and have a den without a leader. Is there a way for me to get that assassin back from the city I assigned him to?