This publication examines various aspects of the Chukchi military affairs throughout the era known to us from written and other sources, starting from the second half of the 17th century, when the Chukchi first encountered the Siberian Cossacks, and up to the beginning of the 20th century, when clashes still occurred based on blood feud. Information is drawn on neighboring peoples, Asian and American Eskimos, Koryaks and Russians, which makes it possible to better reveal the peculiarities of the Chukchi military affairs. The book is the first work in historiography devoted to the military affairs of the Chukchi. It will be useful not only to ethnographers, but also to a wide range of readers interested in military affairs. On the first page of the cover: Chukchi warrior of the 18th century. Reconstruction. Drawing by A V. Kozlenka.