What are the two groups fought for control of Europe in the middle ages?

During the Middle Ages, the two primary groups that fought for control of Europe were the feudal lords, including various monarchs and nobility, and the emerging centralized powers, such as the papacy and later nation-states. Feudal lords vied for land and influence, while the Church sought to assert its authority over spiritual and temporal matters. Additionally, conflicts often arose between rival kingdoms and principalities, as well as between different ethnic and cultural groups, notably during the Crusades and the Hundred Years' War. This struggle for power shaped the political landscape of Europe throughout the medieval period.