General Sir John Monash as a Military Commander General Sir John Monash, Australia’s premier Great War commander. Monash commanded the 4th Australian Brigade at Gallipoli, the 3rd Australian Division AIF, and finally the Australian Corps in 1918. General Sir John Monash as a Military Commander. Paul Cobb, Western Front Association. Please leave this field emptySign up to our Newsletter to get your weekly fill of History News, Articles and Quizzes We don’t spam! We won't share your contact details with anyone else. Check your inbox or spam folder to confirm your subscription.