Complex sentence: The need for a Puerto Rican National Guard became apparent to a Puerto Rican young officer named Luis Raul Estevez, the first Puerto Rican to graduate from the US Military Academy of West Point, and the first official Commandant of the Puerto Rico National Guard.
Split into simpler sentences: The need for a Puerto Rican National Guard became apparent to a Puerto Rican young officer named Luis Raul Estevez. He was the first Puerto Rican to graduate from the US Military Academy at West Point, and the first official Commandant of the Puerto Rico National Guard.