Chasseur

Chasseur (English pronunciation /ʃæˈsɜːr/ sha-SUR; French pronunciation [ʃasœʁ]), a French term for "hunter", is the designation given to certain regiments of French and Belgian light infantry (chasseurs à pied) or light cavalry (chasseurs à cheval) to denote troops trained for rapid action.

This branch of the French Army originated during the War of the Austrian Succession when, in 1743, Jean Chrétien Fischer was authorized by the Marshal de Belle-Isle to raise a six hundred strong mixed force of infantry and cavalry. It was called Fischer's chasseurs. During the remainder of the 18th century various types of light troops (troupes légères) were employed within the French army, either as independent units or as companies within existing regiments.

...
Wikipedia