Complex sentence: Operation Jefferson Glenn ran from September 5,1970 to October 6,1971 and was the last major operation in which U.S. ground forces participated in Vietnam and the final major offensive in which the 101st Airborne Division fought.
Split into simpler sentences: Operation Jefferson Glenn ran from September 5,1970 to October 6,1971 and was the last major operation in which U.S. ground forces participated in Vietnam. It was the final major offensive in which the 101st Airborne Division fought.