Protect any lady, and anyone weaker than yourself. Never break your word. Never ignore an insult to yourself, a lady, your liege-lord, or your faith; insults may only be wiped out by an apology or a duel (not necessarily to the death!). Never take advantage of an opponent in any way; weapons and circumstances must be equal (even in open war if the foe is also noble and chivalrous). Accept any challenge to arms from anyone of greater or equal rank.
An officer should be tough but fair, lead from the front, and look out for his men; an enlisted man should look out for his buddies and take care of his kit. Every soldier should be willing to fight and die for the honor of his unit, service, and country; follow orders; obey the “rules of war”; treat an honorable enemy with respect (a dishonorable enemy deserves a bullet); and wear the uniform with pride.