Who were sans-culotte?

Answer 1

The sans-culottes were the common people of Paris, and were so named this because they didn't wear upper class breeches or culottes. Members of the Paris commune. Made up of working people and the poor
"Sans-Culotte" literally means "without culotte", where culottes were a type of breeches worn by high-class Frenchmen. These people were the bulk of the Revolutionary Army for the French Revolutionary War.