Baronial opposition refers to the resistance and challenges posed by the barons, or noble class, against the authority of a monarch. This conflict often arose when kings imposed heavy taxes or sought to expand their power without the consent of the barons. The barons aimed to protect their rights and privileges, leading to significant political struggles. One notable example of baronial opposition occurred in England during the reign of King John in the early 13th century. The barons' discontent culminated in the signing of the Magna Carta in 1215, which limited the king's power and established certain legal rights for the nobility.