1. He acted in an unchivalrous manner by leaving his date alone at the restaurant.
Il a agi de manière non chevaleresque en laissant sa partenaire seule au restaurant.

2. The knight was criticized for his unchivalrous behavior towards his fellow soldiers.
Le chevalier a été critiqué pour son comportement non chevaleresque envers ses compagnons d'armes.

3. It is considered unchivalrous to speak ill of a lady behind her back.
Il est considéré comme non chevaleresque de parler mal d'une dame dans son dos.

4. The prince's unchivalrous treatment of the servant girl caused outrage among the courtiers.
Le traitement non chevaleresque du prince envers la servante a provoqué l'indignation parmi les courtisans.

5. The general's unchivalrous tactics led to his army's defeat in battle.
Les tactiques non chevaleresques du général ont conduit à la défaite de son armée en bataille.

6. Despite his claims of honor and integrity, his actions were ultimately unchivalrous.
Malgré ses affirmations d'honneur et d'intégrité, ses actions étaient finalement non chevaleresques.