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In page Ecuador:

"

On 21 July 1924, the Ponce-Castro Oyanguren Protocol was signed between Ecuador and Peru where both agreed to hold direct negotiations and to resolve the dispute in an equitable manner and to submit the differing points of the dispute to the United States for arbitration. Negotiations between the Ecuadorian and Peruvian representatives began in Washington on 30 September 1935. The negotiations turned into arguments during the next 7 months and finally on 29 September 1937, the Peruvian representatives decided to break off the negotiations.[citation needed]