 If there was no accord, a Chilean and Argentine delegate and the United States minister to Argentina, William Buchanan, would decide.As foreseen, there was no accord at the conference and Buchanan proceeded with Chilean delegate Enrique Mac Iver and Argentine José Evaristo Uriburu to define the border.Of the 75,000 km2 in dispute 64,000 (85%) were awarded to Argentina and 11,000 (15%) to Chile.