Filibuster (military)
A filibuster (from the Spanish filibustero), also known as a freebooter, is someone who engages in an unauthorized military expedition into a foreign country or territory to foster or support a political revolution or secession. The term is usually applied to United States citizens who incited rebellions/insurrections across Latin America with its recently independent but unstable nations freed from royal control of the Kingdom of Spain and its Spanish Empire in the 1810s and 1820s.