"An army of French Young Gardes (Grenadiers)."—In-game description
The French Expeditionary Company is a Consulate army in Age of Empires III: The Asian Dynasties that can be trained by Chinese and Indians if they choose the French as their ally once the Colonial Age is reached. It consists of four Young Guard (Middle Guard at the Fortress Age, Old Guard at the Industrial Age) Grenadiers.
The French Expeditionary Company offers a boost against all infantry units, although are weak against cavalry units, so should have some protection from heavy cavalry with either light cavalry or heavy infantry.