The emergence of light troops at the time of Louis XV's reign (1715-1774) is a sign of the search for better intelligence of the enemy and rapid tactical moves on battlefields. This fourth instalment of René Chartrand's review of Louis XV's army reveals an extraordinary variety of units, most now long forgotten, who had a dazzling assortment of uniforms, equipment and weapons, as is revealed by this interesting text and its numerous accompanying illustrations, which include eight full page colour plates by Eugène Lelièpvre.