[1] Ajuricaba's origins are unclear, it is believed that he was born in the Rio Negro valley, in the region of Aldeia de Mariuá (today Barcelos, Brazil), possibly educated by Jesuit priests, many historians say that his war tactics were intelligent and that he was a good negotiator, to the point of forming a conglomerate of indigenous nations and forming trades with other Europeans in his neighborhood.

[3] Lusitanian chroniclers revealed that after his capture, possibly made by the betrayal of some of his allies, and taken to be jugged by the Portuguese court, he commanded a riot and committed suicide by throwing himself into the river.

[4] At the end of the 17th century and beginning of the 18th century, a smallpox epidemic hit hard the amerindian populations on the Brazilian coast, leaving scarce natives for slave labor and leading to European settlers entering the jungle to seek and capture more natives for slave labor, in missions called "descimentos", in the Amazon River valley.

Reports of the time reveal that the contact of these groups with Europeans compromised not only their cultural identity, but also their physical integrity, since they were affected by diseases for which they had no defenses or immunities.

Mendes informed the governor of the province that the hostile natives practiced acts of cannibalism and maintained incestuous relations, besides being allies of the Dutch, a nation that was Portugal's enemy at the time; it is believed that Belchior Mendes wanted to call the attention of the church and the king of Portugal, D. João V, because he saw a risk of insubordination ignored by the king and also by the religious institution.