Unión de Naciones Suramericanas (UNASUR) is a group of countries in South America that work together like a team. The union was created to promote political, economic, and cultural cooperation between the countries in the region. All twelve countries in South America are members of UNASUR, which means they work together to solve problems, make decisions, and help each other out. The goal is to make sure all the South American countries are strong and prosperous.