The 5th Brigade was initially formed in mid- 1915 for service during the First World War and consisted of four infantry battalions--the 17th, 18th, 19th and 20th Battalions.
The 5th Brigade was initially formed in mid- 1915 as part of the Australian Imperial Force (AIF) for service during the First World War. Upon formation it consisted of four infantry battalions--the 17th, 18th, 19th and 20th Battalions.