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The Andes Mountains are the eastern border of Chile.
If you simply check a map of the world (google maps is a good source) you will see that the longest land border that Chile has is with Argentina.
Chile
Chile:)
Chile (:
Argentina
Argentina
its Chile, Peru Bolivia and paraguay and BRAZIL!
Chile borders with Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far south.
Chile shares its border with Argentina, Bolivia and Peru.
Argentina
The eastern border of Chile is for the most part, the country of Argentina. Chile also has a small border to the east with Bolivia.
Chile and Argentina
Argentina borders east and Peru and Bolivia to the North.
Chile
chile
Chile and Ecuador don't share a border with Brazil. Chile runs along the west coast of South America. Argentina, Bolivia, and Paraguay are between it and Brazil.Ecuador also is on the west coast. Peru is between Ecuador and Brazil. As the largest country in South America, Brazil shares a border with all the other countries on the continent.