The term ___ was no longer used after the failure of adventurers in Central and South America.

The term Filibuster was no longer used after the failure of adventurers in Central and South America. A filibuster or freebooter, in the context of foreign policy, is someone who engages in an (at least nominally) unauthorized military expedition into a foreign country or territory to foment or support a revolution. The term is usually used to describe United States citizens who fomented insurrections in Latin America.