The decline of knights as soldiers began in the late Middle Ages, when the rise of gunpowder and firearms made their armor obsolete. Knights also became less important as armies became larger and more professional, as they were often replaced by mercenaries or conscripts.
The final blow to the traditional role of knights came with the French Revolution in 1789, which abolished the feudal system and deprived knights of their lands and privileges. Today, the term "knight" is used primarily to refer to an honorary title or rank, rather than a military position.