In Guinea, rival European powers had established control over the trade routes in the region while local African rulers confined the Portuguese to the coast. These rulers then sent enslaved Africans to the Portuguese ports, or to forts in Africa from where they were exported. Thousands of kilometers down the coast, in Angola, the Portuguese found it even harder to consolidate their early advantage in establishing hegemony over the region thanks to the encroachment of Dutch traders. Nevertheless, the fortified Portuguese towns of Luanda (established in 1587 with 400 Portuguese settlers) and Benguela (a fort from 1587, a town from 1617) remained almost continuously in Portuguese hands.