Cicero Township, Cook County, Illinois. Geographic Names Information System. United States Geological Survey; United States Census Bureau 2009 TIGER/Line Shapefiles; United States National Atlas
Feudalism is defined as a Medieval European political, economic and social system from the 9th to 15th century.
The classical feudalism was based on a set of reciprocal legal and military obligations among the warriors of nobility. This system was the direct result of a need of security for the members of nobility, but for the serfs as well against the invasions and attacks by barbarians, pagans and Islamic invaders.