Excavations in the 1990's at Arthurburg Hill in Ionia County (Michigan) revealed an earthwork enclosure and village dating to the Early Woodland period (ca. 400 B.C.). These excavations produced a typical Early Woodland assemblage with stemmed projectile points and interior-exterior cordmarked pottery as well as a small midden with faunal remains and several features with floral remains. The most significant feature of the site is the earthwork enclosure which is among the earliest in the Great Lakes region. This talk will discuss the site in its Early Woodland context and it will be argued that this site had both a defensive and socially integrative function.