Horse cavalry refers to military units that use horses for mounted combat and mobility. Historically, cavalry played a crucial role in battles, providing speed and the ability to maneuver quickly on the battlefield. They were often used for reconnaissance, flanking maneuvers, and charging enemy lines. Cavalry units have existed in various cultures, from the Mongol Empire to Napoleonic Wars. Over time, advancements in technology, such as firearms and mechanized vehicles, led to a decline in traditional horse cavalry. Today, while modern armies primarily rely on armored vehicles, some countries still maintain ceremonial cavalry units for parades and public events.