Costa Rica
In 1948, José Figueres Ferrer led an armed uprising between the previous president Rafael Ángel Calderón Guardia (he served as president between 1940 and 1944) and Otilio Ulate Blanco.  With more than 2,000 dead, the 44-day Costa Rican Civil War was the bloodiest event in Costa Rica during the 20th century.