Complex sentence: Killblane was commissioned as an infantry lieutenant in 1979, upon graduation from West Point, He was assigned to the 8th Infantry Division (Mechanized) in West Germany during the Cold War from 1980 to 1982.
Split into simpler sentences: Killblane was commissioned as an infantry lieutenant in 1979. Upon graduation from West Point, he was assigned to the 8th Infantry Division (Mechanized) in West Germany during the Cold War from 1980 to 1982.