Feudal Europe refers to the social, political, and economic system that dominated medieval European society from the 9th to the 15th century, characterized by a hierarchy of lords, vassals, and serfs. This system was built on land ownership and reciprocal obligations, with lords granting land to vassals in exchange for military service, while serfs worked the land and provided agricultural produce. This structure heavily influenced governance, society, and economy in Europe from 1200 to 1450.