Associated with the local National Guard Company G, First Dakota Infantry Regiment, the utilitarian but richly detailed armory with vertical fluting and corner pavilions replaced an earlier wooden building that burned at the end of World War I. The more overtly Art Deco-inspired auditorium was funded by the WPA as a federal work relief project. Structurally ambitious wood and steel girders enabled column-free longspan drill halls and a flexible auditorium floor. The armory and adjacent auditorium are faithfully maintained as assembly buildings.