"Ships 15 Old Guard Grenadiers. Any remaining Middle Guard are upgraded to Old Guard."
In-game description

Garde Imperial 3 is a technology in Age of Empires III that is unique to the French and can be researched at the Church once the Industrial Age is reached, the Edict of Nantes Home City Card has been sent, and Garde Imperial 2 is researched. Once researched, 15 Royal Guard Grenadiers named Old Guard will appear in the Home City shipment point and the previous twelve Middle Guards (if they still remain) will be upgraded to Old Guards.

Garde Imperial 3, along with the previous Garde Imperial 1 and Garde Imperial 2, is the only way for the French to acquire Grenadiers.

Trivia Edit

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