Complex sentence: For several months in 1914 he was under the direct orders of General Francisco "Pancho" Villa, about whom he later wrote a massive five volume biography entitled "Memorias de Pancho Villa" (1936-1951).
Split into simpler sentences: For several months in 1914, he was under the direct orders of General Francisco "Pancho" Villa. He later wrote a massive five volume biography on him, entitled "Memorias de Pancho Villa" (1936-1951).