1st Infantry Brigade (New South Wales) [First Division] Formed in New South Wales 17 August 1914 and assigned to First Division

Subunits:

• 1st Infantry Battalion 17 August 1914 to past November 1918
• 2nd Infantry Battalion 17 August 1914 to past November 1918
• 3rd Infantry Battalion 17 August 1914 to past November 1918
• 4th Infantry Battalion 17 August 1914 to past November 1918
• 1st Machine Gun Company 12 March 1916 to 2 March 1918
• 1A/1 Light Trench Mortar Battery April 1916 to 15 June 1916
• 1A/2 Light Trench Mortar Battery April 1916 to 15 June 1916
• 1st Light Trench Mortar Battery 15 June1916 to past November 1918

Commanders:

• Colonel H. N. MacLaurin 15 August 1914 to 27 April 1915 (killed)
• Brigadier General H. B. Walker 29 April 1915 to 15 May 1915
• Brigadier General N. M. Smyth 20 May 1915 to 23 January 1916
• Lieutenant Colonel H. E. Elliott 24 January 1916 to 1 March 1916
• Brigadier General N.M. Smyth 1 March 1916 to 28 December 1916
• Colonel T. A. Blamey 28 December 1916 to 9 January 1917
• Lieutenant Colonel I. G. Mackay 9 January to 27 January 1917 
• Brigadier General W. R. Lesslie 27 January 1917 to 6 June 1918
• Brigadier General I. G. MacKay 6 June 1918 to 22 March 1919 

Campaigns:

Egypt, Sinai: Defence of Suez Canal, Gallipoli: Landing at Anzac, Defence of Anzac, Sari Bair, Withdrawal from Anzac, Western Front: Pozieres, Retreat to the Hindenburg Line, Bullecourt, Menin Road, Broodeseinde, Hazebrouck, Amiens, Hindenburg Line

 many details on this page from Ross Mallett's site