With the Treaty of Caracas, Brazil and Venezuela agree on their Amazonian border
The Treaty of Caracas was a mutually beneficial agreement between Brazil and Venezuela that finalized all boundaries in the area of the Amazon. The border was agreed based upon the water divide of the Amazon and Orinoco rivers. Venezuela gave up some territory but gained in economic and navigation rights. (By John Osborne)
Arie Marcelo Kacowicz, Peaceful Territorial Change (Columbia, SC: University of South Carolina Press, 1994), 256.