"I am sure that the U.S. presence will increase."

From Toward Freedom:

The tri-border area is home to the Guarani Aquifer, one of the world’s largest reserves of water. Near the Estigarribia airbase are Bolivia’s natural gas reserves, the second largest in Latin America. Political analysts believe U.S. operations in Paraguay are part of a preventative war to control these natural resources and suppress social uprisings in Bolivia.