Definition of uhlans:

part of speech: noun

A kind of militia among the modern Tartars; a light cavalry of the Polish armies, armed with lance, sabre, & c.; the famous light cavalry of the Prussian armies, chiefly employed as irregulars in foraging, in outpost duty, and suchlike.

Usage examples:

• It seems to me sometimes as if I had never known but one man and one woman in my life- Count Saxe and Francezka Capello; they alone reached the ideal heights, in my mind- for a Tatar prince and the son of a poor notary has his ideals, just the same as a duke and the son of a duke- and the fact that I was a private soldier before I became a Tatar prince and a captain of Uhlans has nothing to do with the matter. Molly Elliot Seawell in "Francezka".

• Uhlans have made their appearance at St. Cloud. Henry Labouchère in "Diary of the Besieged Resident in Paris".