Rio Protocol
29 January 1942
The Protocol of Peace, Friendship, and Boundaries between Peru and Ecuador, or Rio Protocol for short, was an international agreement signed in Rio de Janeiro, Brazil, on January 29, 1942, by the foreign ministers of Peru and Ecuador, with the participation of the United States, Brazil, Chile, and Argentina as guarantors. The Protocol was intended to finally resolve the long-running territorial dispute between the two countries, and brought about the official end of the Ecuadorian–Peruvian War of 1941–1942.