Why did Geoffrey rebel against Henry II?

Geoffrey Plantagenet, the son of Henry II of England, rebelled against his father primarily due to a combination of familial rivalry and the desire for power. He felt marginalized by Henry's preference for his other sons, particularly Richard and John, and sought to assert his own claim to lands and titles. Additionally, Geoffrey aligned himself with his brothers in the revolt against their father's authority, fueled by their collective grievances over Henry's increasingly autocratic rule. This rebellion was part of a larger pattern of conflict within the Plantagenet family during a tumultuous period in English history.