Projectile weapon injuries in the Riparo Tagliente burial (Veneto, Italy) provide early evidence of Late Upper Paleolithic intergroup conflict.

Evidence of interpersonal violence in the Paleolithic is rare but can shed light on the presence of ancient conflict in prehistoric hunter-gatherer societies. Projectile injuries suggest confrontations between groups and have primarily been identified through lithic elements embedded in bones. Recently, the study of projectile impact marks (PIMs) has allowed for the recognition of projectile injuries in the absence of embedded elements. We report here the discovery and study of one of the earliest evidence of PIMs in human paleobiological record, found in the burial from Riparo Tagliente (individual Tagliente 1, Veneto, Italy), directly dated to ca. 17,000-15,500 cal BP. Analyses through SEM and 3D microscopy demonstrate that the femur and the tibia show clear evidence of PIMs impacting the bone from different directions. This could be due to the presence of multiple attackers, or to the victim turning between impacts. No trace of healing is present; one PIM is close to the femoral artery, which can cause a rapid death if pierced. Evidence at Riparo Tagliente could be attributed to conflict between different groups of hunter-gatherers expanding in newly opened Alpine territories during climatic amelioration after the Last Glacial Maximum.