Complex sentence: He served as commander of the Canadian Flotilla Atlantic, as vice-chief of the defence staff from 1974 to 1977, and as chairman of the NATO Military Committee from 1980 to 1983.
Split into simpler sentences: He served as commander of the Canadian Flotilla Atlantic. Vice-chief of the defence staff 1974 to 1977 and chairman of the NATO Military Committee from 1980 to 1983.