Complex sentence: During the American Revolutionary War was commissioned a captain in Col. Thomas Proctor's Pennsylvania Artillery October 5,1776, promoted to major March 3,1777, and lieutenant colonel December 2,1778.
Split into simpler sentences: During the American Revolutionary War was commissioned a captain in Colonel Thomas Proctor's Pennsylvania Artillery Battalion on October 5,1776. He was promoted to major on March 3,1777 and lieutenant colonel on December 2,1778.