31 Aug U.S.-COLOMBIA RELATIONS. The United States established diplomatic relations with Colombia in , following its independence from Spain. Colombia is a middle-income country and one of the oldest democracies in Latin America. Colombia has experienced more than half a century of conflict with. 15 Sep An estimated million Hispanics of Colombian origin resided in the United States in , according to a Pew Research Center analysis of the Census Bureau's. Embassy of Colombia in Washington, D.C.. According to author Robin Kirk, most Americans remain naïve about the role of the United States in Colombia's historical development and the nation's continuing violence. Colombia's own history has been studied from the.