Complex sentence: He was liberated thanks to the pressure of his friends but was forced into exile to Chile in 1932 from which he could only return after the assassination of Luis Miguel Sánchez Cerro in 1933.
Split into simpler sentences: He was liberated thanks to the pressure of his friends but was forced into exile to Chile in 1932. He could only return to Peru after the assassination of Luis Miguel Sánchez Cerro in 1933.