Complex sentence: He was ordained as a rabbi in 1955, entering the United States Air Force to serve as a military chaplain, using his experiences in his first novel, The Conversion of Chaplain Cohen.
Split into simpler sentences: He was ordained as a rabbi in 1955 and entered the United States Air Force to serve as a military chaplain. He used his experiences as a military chaplain in his first novel, The Conversion of Chaplain Cohen.