Ecuadorian and U.S. Marines listen to a religious service during UNITAS-Partnership of the Americas 2012 Sept. 9. UNITAS-Partnership of the Americas gives the participating troops from Brazil, Canada, Chile, Colombia, Ecuador, Mexico, Paraguay, Peru, the United States and Uruguay an opportunity to exercise critical thinking based on realistic scenarios, reinforce essentialtactics and techniques and build on a strong foundation of professional cooperation. - Ecuadorian and U.S. Marines listen to a religious service during UNITAS-Partnership of the Americas 2012 Sept. 9. UNITAS-Partnership of the Americas gives the participating troops from Brazil, Canada, Chile, Colombia, Ecuador, Mexico, Paraguay, Peru, the United States and Uruguay an opportunity to exercise critical thinking based on realistic scenarios, reinforce essentialtactics and techniques and build on a strong foundation of professional cooperation.