Gustavo Rueda Díaz (February 21, 1962 in Barrancabermeja, Colombia – October 24, 2007 in El Carmen de Bolívar, Colombia), known by his nom de guerre Martín Caballero, was a Colombian guerrilla leader, member of the Revolutionary Armed Forces of Colombia (FARC) and commander of the 37th Front [1] Caribbean Bloc of the FARC-EP that operates in Caribbean Region.
He was killed in action by the Colombian Army after a military operation on October 25, 2007.
Colombian authorities wanted him on charges of rebellion, extortion, terrorism, first degree murder, armed assault, assault and battery and kidnapping among others.
[2] Defense Minister Juan Manuel Santos described his death as the "most important" blow against FARC in 2007.