You need to fight without an army and on defense if you want to get BattleChivalry. Or kill 8 units with your general (not your general's bodyguard, your general) and have some luck. Definitely don't fight battles with odds that are greater than 3:2.
Once you got it though, you can behave like a manslaughtering devil without it going back to BattleChivalry again...

As for the view city, you might want to check out this if you really miss it: https://forums.totalwar.org/vb/showthread.php?t=86226