Chevaliers are front runners among all troops, with a great deal of hitpoints, they can endure more than any other troop. For their strength in taking damage, they do sheer damage themselves and cannot win battles unless they are supported by stronger troops.
Due to the French's nation power of troops trained quicker; the chevalier can be trained in 2 minutes and 48 seconds which is 42 seconds earlier than standard heavy cavalry (3 minutes and 30 seconds).
The Chevalier is one of the strongest units in the game; as well as the strongest heavy cavalry.
The Chevalier has more damage than standard heavy cavalry and can minimize casualties.
As a French unique unit, chevaliers can inflict more damage and has more health than standard horsemen.
"'Chevalier' is French for 'chivalrous person,' or 'knight.' This would be a member of the nobility wealthy enough to own a horse and armor, sworn to serve his feudal master in battle. The lowest rank of chevalier would be composed of the second sons of lesser lords who were unlikely to inherit property and thus had to seek their fortunes in war. Most chevaliers would be armed with lances or heavy spears and wear chain mail or heavier. They'd be more than a match for any uppity peasants in the neighborhood, not to mention enemy infantry."
Chevaliers have a lot of health but are slow and have low attack power, so use them in groups.
Chevaliers are weak against many defenses grouped together.
Due to their high health, chevaliers can be use as meat shields to protect infantry from the defenses.
When pushing for trophies, you would need to destroy the Town Center. In many bases, the town center would be in the center of the base. First, train up an army of chevaliers. When attacking, deploy all your chevaliers in the areas which the Town Center is more close to. If there are a few defenses blocking the way, destroy them. Then rally your chevaliers to destroy the Town Center.
Chevaliers would ignore defensive troops and would pursue their targets which are defensive buildings. However, if a defensive troop attacks the chevalier, the chevalier will attack back until the defensive troop is killed; thus making the chevalier distracted. Try to use and deploy ranged infantry such as composite bowmen or heavy infantry such as hoplites after deploying the chevaliers to eliminate the defensive troops.
Chevaliers are a good alliance troop due to its high health; making it longer to kill them. However, they take up 6 space in the alliance gate so it cannot be used in a level 1 Alliance Gate in the Iron Age (which can only hold 3 spaces) until it is upgraded to level 2 which is available in the Classical Age.