Original sentence: William Thompson Lusk (May 23, 1838 – June 12, 1897) was an American obstetrician who was a soldier who rose to the rank of Assistant Adjutant-General in the United States Volunteers during the first three years of the American Civil War, as well as a president of the Bellevue Hospital Medical College
Edited sentence: After he retired from the Union Army, he finished his medical education and became a professor as well as a president of the Bellevue Hospital Medical College.William Thompson Lusk (May 23, 1838 – June 12, 1897) was an American obstetrician who was a soldier who rose to the rank of Assistant Adjutant-General in the United States Volunteers during the first three years of the American Civil War