Peru-Ecuador-Colombia-Brazil claims timeline go!
Well, this took far longer than it should have, for the simple reason that Latin American clams are ludicrously poorly sourced and virtually every single period map is drawn by a rabid nationalist. The major landmarks (with thanks to
Thande and
DValdron):
1890 - Herrera-Garcia: Ecuador claims a wide strip including the Napo and Putamayo rivers, with the northern bank of the Maranon as its extreme claim.
(Note: it's possible that before the 1904 clashes Ecuador controlled more of the Napo river basin as a
de facto border, but it seems to have been more or less soldiers wandering through the jungle)
1916 - Muñoz-Suarez: Ecuador gives up a chunk of its Amazonian claims in favour of a stable northern border. Unfortunately...
1922 - Salomón–Lozano: ...Colombia and Peru promptly sign a treaty defining their border as the Putumayo river, with Peru ceding a corridor to give Colombia access to the Amazon; their present-day border. Unfortunately this not only hands over territory Colombia previously recognised as Ecuadorian to Peru, but means Peru surrounds Ecuador on three sides.
1928 - However, Salomón–Lozano isn't popular in Peru, and the treaty is repudiated by Peru when it becomes common knowledge that Leticia was ceded to Colombia. Peru resumes its old claims until...
(Also, this year Colombia and Brazil finalised their border)
1933 - ...Colombia kicks its rear-end in the Colombia-Peru War and forces it to re-affirm the treaty.
1936 - Ulloa-Viteri. A status quo agreement redefines the borders based on actual control - it's later used as the starting point for the Rio borders. Peru sees this as a binding agreement - Ecuador as just a ceasefire line that does not affect their claims.
1941 - Rio. Ecuador takes disastrous losses in the Ecuador-Peruvian War and the Rio de Janeiro Protocol defines the borders we have today. Relative to the status quo line, Ecuador cedes 18,552 km² to Peru - Peru cedes 5,072 km² to Ecuador.
However...
1948 - ...the Cordillera del Cóndor proves a sticking point and Ecuador claims Rio cannot be implemented in this region due to discrepancies between on-the-ground realities and the treaty's idealisations. Ecuador claims the Upper Cenepa river valley again.
1960 - Ecuador declares Rio null and void as it was signed under duress and resumes its former claims.
1998 - After the Cenepa War Ecuador agrees to close the border along the Cordillera del Cóndor based on the Rio de Janeiro agreement and effectively ceases to claim Peruvian territory.
Sources:
http://www.zonu.com/images/0X0/2010-01-13-11724/America-del-Sur-en-1914.jpg
http://www.probertencyclopaedia.com...merica and West Indies South America 1926.jpg
http://upload.wikimedia.org/wikipedia/commons/9/93/Peru_ecuador_dispute.jpg
http://upload.wikimedia.org/wikipedia/commons/1/14/Ecuador-peru-land-claims-01.png
http://www.hipkiss.org/data/maps/lo...es-atlas_1920_south-america_3012_3992_600.jpg
http://www.4shared.com/photo/1rQkIhb4/P_214-215_-_South_America_-_19.html
http://ny-image1.etsy.com/il_fullxfull.116280525.jpg
http://andeanairmail.com/wp-content/uploads/2007/12/peru-ecuador-border-conflict.JPG