Complex sentence: He attended private schools there until 1893 when his family moved to Washington, D.C. He graduated from Western High School in 1897 and was appointed a second lieutenant in the Marine Corps from civilian life on 13 April 1900.
Split into simpler sentences: He attended private schools there until 1893 when his family moved to Washington, D.C. He graduated from Western High School in 1897. Holcomb was appointed a second lieutenant in the Marine Corps from civilian life on 13 April 1900.