The Strait of Magellan, also called the Straits of Magellan, is a navigable sea route in southern Chile separating mainland South America to the north and Tierra del Fuego to the south. The strait is considered the most important natural passage between the Atlantic and Pacific oceans. The strait is approximately 570 km long and 2 km wide at its narrowest point. In 1520, the Spanish expedition of the Portuguese navigator Ferdinand Magellan, after whom the strait is named, became the first Europeans to discover it.

The Tehuelche people, also called the Aónikenk, are an Indigenous people from eastern Patagonia in South America. In the 18th and 19th centuries the Tehuelche were influenced by Mapuche people, and many adopted a horseriding lifestyle. Once a nomadic people, the lands of the Tehuelche were colonized in the 19th century by Argentina and Chile, gradually disrupting their traditional economies. The establishment of large sheep farming estates in Patagonia was particularly detrimental to the Tehuelche. Contact with outsiders also brought in infectious diseases ushering deadly epidemics among Tehuelche tribes. Most existing members of the group currently reside in cities and towns of Argentine Patagonia.