The main focus of the bandeirantes' missions was to capture and enslave native populations. They carried this out by a number of tactics. The bandeirantes usually relied on surprise attacks, simply raiding villages or collections of natives, killing any who resisted, and kidnapping the survivors. Trickery could also be used; one common tactic was disguising themselves as Jesuits, often singing Mass to lure the natives out of their settlements. At the time, the Jesuits had a deserved reputation as the only colonial force that treated the natives somewhat fairly in the Jesuit reductions of the region. 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 were comparatively expensive, the bandeirantes were able to sell large numbers of native slaves at a huge profit due to their relatively inexpensive price. Bandeirantes also teamed up with a local tribe, convincing them that they were on their side against another tribe, and when both sides were weakened the Bandeirantes would capture both tribes and sell them into slavery.