Complex sentence: Ken Gillespie enlisted in the Australian Army in 1968 as an apprentice, where he later graduated from the Officer Cadet School, Portsea, in 1972, gaining a commission in the corps of the Royal Australian Engineers.
Split into simpler sentences: Ken Gillespie enlisted in the Australian Army in 1968 as an apprentice. He graduated from the Officer Cadet School, Portsea, in 1972, gaining a commission in the corps of the Royal Australian Engineers.