Bandeirantes

The Bandeirantes (Portuguese pronunciation: [bɐ̃dejˈɾɐ̃t(ʃ)is]) were 17th-century Portuguese settlers in Brazil and fortune hunters. This group mostly hailed from the São Paulo region, which was known as the Captaincy of São Vicente until 1709 and then as the Captaincy of São Paulo. They led expeditions called bandeiras (Portuguese, "flags") which penetrated the interior of Brazil far south and west of the Tordesillas Line of 1494, which officially divided the Castilian, later Spanish, (west) domain from the Portuguese (east) domain in South America.

The São Paulo settlement served as the home base for the most famous bandeirantes. Most bandeirantes were descendants of first- and second-generation Portuguese who settled in São Paulo, but their numbers also included many people of mameluco background (people of both European and Native American ancestries). Though they originally aimed to capture and force Indigenous Americans into slavery, the bandeirantes later began to focus their expeditions on finding gold, silver, and diamond mines. As they ventured into unmapped regions in search of profit and adventure, they expanded the effective borders of the Brazilian colony.

The main focus of the bandeirantes' earlier missions was to enslave native populations. They carried this out by disguising themselves as Jesuits, often singing mass to lure the natives out of their settlements. However, they usually relied on surprise attacks. If luring the natives with promises did not work, the bandeirantes would surround the settlements and set them alight, forcing inhabitants out into the open. At a time when imported African slaves sold from $100–$500 the bandeirantes were able to sell large numbers of native slaves at a huge profit due to their relatively inexpensive price.

The first bandeira took place in 1628 and was organized by Antônio Raposo Tavares. This bandeira raided 21 Jesuit villages in the upper Paraná Valley, ultimately capturing about 2,500 natives. A bandeira tactic was to set native tribes against each other in order to weaken them, and then to enslave both sides.

...
Wikipedia