Chivalry is a technology in Age of Empires II: The Forgotten that is unique to the Franks and can be researched at the Castle. Once researched, it increases the working speed of Stables by +40%.
Strategy
As the vast majority of a Frankish army is Knights and their upgrades, Chivalry helps a lot with making a large army in a short amount of time. It should be researched if the player already has a minimum of five Stables and optimally around nine of them. With the resources it takes to research Chivalry, over five Knights can be created, but if the player economy is thriving they should research this in order to gain an edge on military production by speeding up the creation of Knights. It might also be useful if the player finds that they are being pressured and doesn't have the room to build extra Stables.