they would not be knights any more
It was called, "The Code of Chivalry". Knights who broke this code were stripped from their rank and shamed.
The knights code of behavior is call "chivalry."
They followed the Knights Code of Chivalry.
Chivalry
The code of conduct for knights is called a Chivalry.
the Chivalry code.
Code of Chivalry
King Arthur's knights had a code of chivalry
The European knights followed the Code of Chivalry, which was a moral and honor code.
A code of conduct for knights.
Chivalry
Chivalry was the code.