The Qulla (Quechuan for south, Hispanicized and mixed spellings: Colla, Kolla) are an indigenous people of western Bolivia, Chile, and Argentina living in west of Jujuy and west of Salta Province. The 2004 Complementary Indigenous Survey reported 53,019 Qulla households living in Argentina. They moved freely between the borders of Argentina and Bolivia. Their lands are part of the yungas or high altitude forests at the edge of the Amazon rainforest. The Qulla have lived in their region for centuries. Sillustani is a prehistoric Qulla cemetery in Peru, with elaborate stone chullpas. Several groups made up the Qulla people, including the Zenta, and Gispira. The Qulla came into contact with Spaniards in 1540. They resisted the Spanish invasion for many years but ultimately failed and the Santiago Estate fell into Spanish hands. One particularly famous rebel leader was Ñusta Willaq, a female warrior who fought the Spanish in 1780. With Argentinian independence in 1810, the situation of the Qulla people did not improve and they worked for minimal wages. On 31 August 1945, Qulla communities in the northwestern Argentine provinces of Jujuy and Salta, through a group of representatives, sent a note to the National Agrarian Council demanding the restitution of their lands, in compliance with previous laws. On 17 January 1946 President Edelmiro Julián Farrell signed the expropriation decree. But as funds for the necessary land surveys and paperwork were in progress, the direction of the Council passed to other people, who blocked them. In 1946, Qulla people joined the Malón de la Paz, a march to the capital of Buenos Aires to demand the return of their lands. In the 1950s, Qulla people worked in the timber industry on their ancestral lands. In 1985, the Argentinian government officially recognized the indigenous peoples of that country by Law 23303. A cholera epidemic took a toll on the Qulla population in the late 20th century. In August 1996, many Qulla people occupied and blocked roads to their traditional lands but were violently stopped by the police.