Late 19th and early 20th centuries saw a series of conflicts, interventions, and tensions involving the United States, in Central America.
These revolved around acquisition of large pieces of land, toppling rulers to more favourable ones, servitude of local population and use of American armed forces so that American corporations could secure the resource (X) and distribute it back home.
It even led to the term ‘(X) Republic’, a politically and economically unstable country with an economy dependent upon the export of natural resources.
Identify the resource (X).