I'm new here, I do not know if this scenario fits here, but, come on.
I was thinking of a scenario in which an indigenous empire, at the same level of development as the Incas, developed along the coast of Brazil, from the mouth of the São Francisco river, in northeastern Brazil, to the estuary of the Rio Plate, in the argentina and uruguay, going up the Paraná river amd Paraguay river.
The empire would have a population of 10 million, how could it have arisen and developed, and how would it be related to the arrival of the portuguese on the Brazilian coast?
The map is only a sketch to get a sense of the locality of the Empire.
I was thinking of a scenario in which an indigenous empire, at the same level of development as the Incas, developed along the coast of Brazil, from the mouth of the São Francisco river, in northeastern Brazil, to the estuary of the Rio Plate, in the argentina and uruguay, going up the Paraná river amd Paraguay river.
The empire would have a population of 10 million, how could it have arisen and developed, and how would it be related to the arrival of the portuguese on the Brazilian coast?
The map is only a sketch to get a sense of the locality of the Empire.