In this episode, we explore the rise, organization, and military strength of the Inca army, from its beginnings as a small regional force to its development into a disciplined imperial power. We examine the army’s strict decimal hierarchy, multi-ethnic composition, advanced road network, and strategically placed colcas that supplied troops across vast and difficult terrain. The episode also covers Inca weapons, armor, fortifications, psychological warfare, pincer movements, and the later shift to guerrilla tactics during the Spanish invasion, revealing how discipline, logistics, and adaptability helped sustain one of the ancient Americas’ most formidable military systems.