In December 1931, a coup d'état was organized by junior officers and led by Martínez. Only the First Regiment of Cavalry and the National Police defended the presidency (the National Police had been on its payroll), but later that night, after hours of fighting, the badly outnumbered defenders surrendered to rebel forces. The Directorate, composed of officers, hid behind a shadowy figure, a rich anti-Communist banker called Rodolfo Duke, and later installed the ardent fascist Martínez as president. The revolt was probably caused by the army's discontent at not having been paid by President Araujo for some months. Araujo left the National Palace and unsuccessfully tried to organize forces to defeat the revolt.