Feudalism spread from France to Spain, Italy, and later Germany and Eastern Europe. In England the Frankish form was imposed by William I (William the Conqueror) after 1066, although most of the elements of feudalism were already present. It was extended eastward into Slavic lands to the marches (frontier provinces), which were continually battered by new invasions, and it was adopted partially in Scandinavian countries. The important features of feudalism were similar throughout, but there existed definite national differences. Feudalism continued in all parts of Europe until the end of the 14th cent.