Not to be forgotten
The genocide of the Aché Guayaki in Paraguay
D. Anton

The indigenous nation of the Aché Guayaki or simply Aché (they do not accept the term Guayaki) is made up of communities in the eastern region of Paraguay that have lived there since time immemoria times.
It is a people more ancient than the Guarani themselves. The Guarani settled in Paraguay and areas of influence about 2,000 years ago. The Aché were already there long time before. Originally they had their own language but gradually became guaranized and developed their own syncretic dialect. Although they were evicted from their ancestral lands, they managed to survive the Spanish conquest and colonization by entering the jungles, particularly the Canindeyú forests. 
Their drama became more acute at the end of the 1960s, during the military dictatorship of Alfredo Stroessner, the policy of road expansion and the advancement of the agro-livestock sector towards the eastern region cornered the last “uncontacted” Aché of the Canindeyú forests . The Aché were a "problem" for the occupants of the "new lands" (which were ancestral Aché territory). 
At the end of the 1960s, the practice of organizing Aché hunts had been extended by the new settlers who settled in the area.

The dictatorial regime began at that time a campaign of forced sedentarization of the community to expel them from the region and concentrate them in the Guayakí National Colony, under military command, the Department of Indigenous Affairs and the Ministry of National Defense. Those who refused to move to the Colony were forcibly captured in "expeditions" organized by the military commanders of the Colony. The Aché were victims of murder, mass capture, forced displacement, etc. in what can be called a true ethnic cleansing operation at the new agro-livestock development zone.  Once in the Colony many Aché were handed over as practically slave labor. Particularly painful was the case of the sale and delivery of many of these children to Paraguayan families, suppressing their identity, ending in the majority of cases as domestic servants.
The Aché population declined rapidly. In pre-colonial times there were maybe 20,000 or 30,000 people. In the last census of 2012 there are just over 1,000 acculturated, discriminated against and subjected to poverty.