“It appears that the Inca relied less on warfare to conquer other groups and more on political alliances, bloodless takeovers and ideological control tactics,” Andrushko says.
An Inca conquest gambit mentioned in some Spanish accounts involved sending a diplomatic team to offer local groups gifts and military protection. Accepting this proposal required groups to submit to Inca rule. The Inca army waited nearby to make clear what happened to those who declined the offer.
Story: Franklin Briceno, AP | Photo: V. Andrushko and E. Torres/American Journal of Physical Anthropology 2011