The Conquest of the Desert was an Argentine military campaign directed mainly by General Julio Argentino Roca during the 1870s and 1880s with the intention of establishing dominance over Patagonia, inhabited primarily by indigenous peoples. The Conquest of the Desert extended Argentine territories into Patagonia and ended Chilean expansion in the region.

Alejo Julio Argentino Roca Paz was an army general and statesman who served as President of Argentina from 1880 to 1886 and from 1898 to 1904. Roca is the most important representative of the Generation of '80 and is known for directing the Conquest of the Desert, a series of military campaigns against the indigenous peoples of Patagonia sometimes considered a genocide.