You must have a colonial nation in the region already.
Thus if you have a CN Brazil you can get castile etc to concede that region and will get all of their colonies in that region. If you don't have a CN in Brazil you have to take individual provinces as in any other war.
CB makes no difference.
Thus if you have a CN Brazil you can get castile etc to concede that region and will get all of their colonies in that region. If you don't have a CN in Brazil you have to take individual provinces as in any other war.
CB makes no difference.