Why were Indigenous peoples living along major travel routes especially harmed by European conquest?

Indigenous peoples living along major travel routes in South America were particularly harmed by European conquest because these locations experienced the most intense and continuous contact with colonizers.12

These areas, which included major river systems and coastlines, were where European forces arrived in the greatest numbers. This geographic accessibility led to several devastating consequences:1

• Continuous Exposure to Violence: Populations along these routes faced nearly constant exposure to the violence of conquest, including military conflict and enslavement.12
• Rapid Spread of Disease: Because these routes served as primary corridors for travel and communication, they facilitated the rapid transmission of Old World diseases, such as smallpox, to which Indigenous peoples had no inherited immunity.314
• Displacement and Exploitation: The high concentration of Indigenous people in these accessible areas made them primary targets for colonial exploitation, labor demands, and displacement.1

While Indigenous groups in more isolated, marginal areas were sometimes able to avoid the immediate impact of soldiers and settlers, those along major navigational routes suffered from a combination of these factors, leading to severe population declines and, in some cases, near extinction.12