The "Barons of England" were noble landowners who held significant power and influence during the medieval period. They were often granted land by the monarch in exchange for military service and loyalty. Barons played a crucial role in the feudal system, managing their estates and providing protection to the peasants who worked the land. In 1215, the barons famously rebelled against King John, leading to the signing of the Magna Carta. This document limited the king's power and established certain legal rights, marking a pivotal moment in the development of constitutional governance in England. The barons' actions laid the groundwork for the future evolution of the English monarchy and legal system.