In the latter part of the fifteenth century the Inka Empire was forming in the Andes Mountains of South America. By the time of the European invasion in A. D. 1532, the Inka state covered a territory over 5,000 km. long from the present-day Colombian-Ecuadorian border to a point south of Santiago, Chile. The rapid Inka domination of much of the Andes left many notable archaeological records, one of which is the site Inkawasi which was used in conquest of the Canete Valley on the coast of Peru. This monograph reports archaeological research at Inkawasi.