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I'm working through a timeline, doing some research now, wherein Dutch Brazil, New Holland survives. My very very rough version binds Portugal to the coast, by the Sao Fransisco and Parana rivers. New Holland comes in from the coast to the interior. The Anglo-Spanish war concludes to such effect that the English capture the River Plate, a very sparsely inhabited region, claiming all land where rivers flow into the Atlantic. The English have this *in addition to* its North American colonies (unlike Platoon Sgt's timeline, where North America is more multipolar). The English bound south and north, hemming the Portuguese in on the east, and spreading north and west into Brazil. My question is - how far north and west can the English go and how far west and south can the Dutch go, so as to avoid another Spanish war? Can I have the English and Dutch bound by the southern Amazon basin, and the Andes? Would Spain agree to that if pressed?