Complex sentence: General Augusto Pinochet, previously second in command and thought to be loyal to Allende, was appointed Commander in Chief of the Army, taking over the position on August 23,1973.
Split into simpler sentences: General Augusto Pinochet, previously second in command and thought to be loyal to Allende, was appointed as Commander in Chief of the Army. General Pinochet took over the position on August 23,1973.