The Feudal Era, which lasted from the 9th to the 15th century, was a social and economic system in medieval Europe. It was characterized by a hierarchy where land was owned by nobles, known as lords, who granted portions of their land, called fiefs, to vassals in exchange for military service and loyalty. Peasants, or serfs, worked the land and provided food, while having limited rights and freedoms. This system created a network of obligations and protections. Knights, who were often vassals, served as mounted warriors for the lords, while the lords offered protection to their vassals and serfs. The Feudal Era shaped the political landscape of Europe and influenced the development of modern nations.