Why did some indigenous groups hope for a Confederate victory in the Civil War?

Because the union had pushed them out of their land and hurt them so much, they wanted to seek revenge on the union. They had also hoped that the confederates wouldn't push them out any more.

these acts divided the south into five military districts.

populist movement, in u.s. history, politically oriented coalition of agrarian reformers in the middle west and south that advocated a wide range of economic and political legislation in the late 19th century. thus in 1892 their leaders organized the populist, or people's, party, and the farmers' alliances melted away.