Complex sentence: After his retirement from the Army in Peru, he went back to the Argentine Republic, where De las Heras was appointed governor of Buenos Aires by the Chamber of Representatives, succeeding General Martín Rodríguez in May, 1824.
Split into simpler sentences: After his retirement from the Army, he was appointed governor of Buenos Aires by the Chamber of Representatives, succeeding General Martín Rodríguez. After retiring from Peru he went to the Argentine Republic, where he was elected governor of the province of Buenos Ayres in May, 1824.