1st Australian Division
On the 3rd of August 1914 the Australian government offered to send an expeditionary force of 20,000 men to Europe, which it decided to organise as an infantry division and a light horse brigade. Accordingly, the First Division was formed in Australia in August 1914. Intended to be representative of the nation as a whole, it was organised from contingents from all states. It was originally intended to send the division to England for training and thence on to the Western Front but the division was diverted to Egypt instead on the recommendation of Colonel Harry Chauvel, owing to the state of training areas in the United Kingdom. The division arrived in Egypt in December and began training at Mena, near Cairo.
On Anzac Day, 25 April 1915, the First Division made an amphibious assault at what is now known as Anzac Cove, on the Gallipoli Peninsula. On Anzac Day the division was unable to capture its objectives but secured a toehold on the peninsula. It served throughout the campaign there. In May the 2nd Brigade was re-embarked and participated in the attack on Krithia at Helles but returned in time for the Turkish counter offensive on 19 May. On 15 May, its commander, Major General William Bridges was fatally wounded by a sniper. During the August offensive, the First Division captured the Turkish positions around Line Pine. Finally, it was involved in the withdrawal to Egypt in December 1915.
In March 1916 it moved to France, taking over part of the line in the "nursery sector" around Armentieres. On 23 July 1916, it joined the Somme Offensive, capturing the town of Pozieres. A second tour of Pozieres followed in August and a third at Flers in October after a rest break in the Ypres sector.
In 1917 it was involved in the pursuit of the Germans to the Hindenburg Line. While maintaining outposts close to that line around Lagnicourt, the division was struck by a powerful German counterattack on 15 April 1917. In May it relieved the Second Division in the Second Battle of Bullecourt.
After a rest spell, the division returned to the Ypres Salient and participated in the Third Battle of Ypres, in which it fought with at Menin Road in September and Broodeseinde in October.
In April 1918 the First Division halted the German offensive at Hazebrouck. It remained there, apart from the other divisions for four months, it rejoined the Australian Corps in the Somme region in 1918 in time to participate in the Battle of Amiens and fought on to the Hindenburg Line.
Commanders:
Major General William T. Bridges 6 August 1914 to 15 May 1915 (mortally wounded)
Brigadier General H. B. Walker 15 May 1915 to 24 June 1915
Major General J. Gordon Legge 24 June 1915 to 26 July 1915
Brigadier General H. B. Walker 26 July 1915 to 13 October 1915 (wounded)
Brigadier General J. J. Talbot Hobbs 13 October 1915 to 6 November 1915
Brigadier General/Major General Harry Chauvel 6 November 1915 to 14 March 1916
Major General H. B. Walker 14 March 1916 to 31 May 1918
Major General T. William Glasgow 31 May 1918 to past November 1918
Campaigns:
Egypt: Defence of Suez Canal,
Gallipoli: Landing at Anzac, Defence of Anzac, Sari Bair,
Western Front: Pozieres, Mouquet Farm, Le Barque, Tilloy, Boursies, Demicourt, Hermies, Lagnicourt, Bullecourt, 3rd Battle of Ypres, Menin Road, Broodseinde Ridge, Passchendale, Battle of the Lys, 2nd Battle of the Somme, Lihons, Chuignolles, Hindenburg Line.
Casualties:
killed in action: 10,447
died of wounds: 3,553
other deaths: 1,133
prisoners: 500
wounded: 35,984
total: 51,647
Memorial
Pozieres, France,
Order of battle:
First Division (Egypt and Gallipoli, 1914-15)
1st Division Artilley
1st Field Artillery Brigade [12 x 18 pounders]
1st, 2nd, 3rd Field Artillery Batteries (New South Wales)
1st Brigade Ammunition Column
2nd Field Artillery Brigade [12 x 18 pounders]
4th, 5th, 6th Field Artillery Batteries (Victoria)
2nd Brigade Ammunition Column
3rd Field Artillery Brigade [12 x 18 pounders]
7th, 8th, 9th Field Artillery Batteries (Queensland; Western Australia; Tasmania)
3rd Brigade Ammunition Column
1st Heavy Battery [2 x 6 inch howitzers, 1 x 4.7 inch gun]
1st Division Ammunition Column
1st Division Engineers
1st,2nd,3rd Field Companies (New South Wales; Victoria; Outer States)
1st Signal Company
2nd Signal Troop
1st Infantry Brigade
1st, 2nd, 3rd, 4th Infantry Battalions (New South Wales)
2nd Infantry Brigade
5th, 6th, 7th, 8th Infantry Battalions (Victoria)
3rd Infantry Brigade
9th, 10th, 11th, 12th Infantry Battalions (Queensland; South Australia; Western Australia; Tasmania, South Australia and Western Australia)
1st Division Medical Services
1st, 2nd, 3rd Field Ambulances (New South Wales; Victoria; Outer States)
2nd Light Horse Field Ambulance
1st Sanitary Company
4th Light Horse Regiment (Victoria)
2nd Light Horse Brigade
5th, 6th, 7th Light Horse Regiments (Queensland; New South Wales; New South Wales)
1st Divisional Train
1st, 2nd, 3rd, 4th, 6th Army Service Corps Companies (New South Wales and Victoria; New South Wales; Victoria; South Australia, Western Australia and Tasmania)
First Division (France, April 1916)
1st Division Artillery
1st Field Artillery Brigade [16 x 18 pounders]
1st, 2nd, 3rd, 22nd Field Artillery Batteries
1st Brigade Ammunition Column
2nd Field Artillery Brigade [16 x 18 pounders]
4th, 5th, 6th, 23rd Field Artillery Batteries
2nd Brigade Ammunition Column
3rd Field Artillery Brigade [16 x 18 pounders]
7th, 8th, 9th, 24th Field Artillery Batteries
3rd Brigade Ammunition Column
21st Field Artillery (Howitzer) Brigade [12 x 4.5 inch howitzers]
101st,102nd,103rd Field Artillery (Howitzer) Batteries
21st Brigade Ammunition Column
1st Division Ammunition Column
1st Division Trench Mortars
V1A Heavy Trench Mortar Battery [4 x 9.45 inch heavy trench mortars]
X1A,Y1A, Z1A Medium Trench Mortar Batteries [12 x 2 inch medium trench mortars]
1st Division Engineers
1st, 2nd, 3rd Field Companies (New South Wales; Victoria; Outer States)
1st Signal Company
1st Infantry Brigade
1st, 2nd, 3rd, 4th Infantry Battalions (New South Wales)
1st Machine gun Company [16 x Vickers Machineguns]
1A/1, 1A/2 Light Trench Mortar Batteries [8 x 3.7 and 4 inch trench mortars]
2nd Infantry Brigade
5th, 6th, 7th, 8th Infantry Battalions (Victoria)
2nd Machinegun Company [16 x Vickers Machineguns]
2A/1, 2A/2 Light Trench Mortar Batteries [8 x 3.7 and 4 inch trench mortars]
3rd Infantry Brigade
9th, 10th, 11th, 12th Infantry Battalions (Queensland; South Australia; Western Australia; Tasmania, South Australia and Western Australia)
3rd Machine gun Company [16 x Vickers Machineguns]
3A/1, 3A/2 Light Trench Mortar Batteries [8 x 3.7 and 4 inch trench mortars]
1st Pioneer Battalion
1st Division Medical Services
1st, 2nd, 3rd Field Ambulances (New South Wales; Victoria; Outer States)
2nd Sanitary Section
B Squadron, 4th Light Horse Regiment (Victoria)
1st Cyclist Company
1st Salvage Section
1st Divisional Train
1st, 2nd, 3rd, 4th Australian Army Service Corps Companies
1st Division Supply Column
1st Division Ammunition Sub Park
1st Mobile Veterinary Section
First Division (France, July 1916)
1st Division Artillery
1st Field Artillery Brigade [12 x 18 pounders, 4 x 4.5 inch howitzers]
1st, 2nd, 3rd Field Artillery Batteries
101st Field Artillery (Howitzer) Battery
2nd Field Artillery Brigade [12 x 18 pounders, 4 x 4.5 inch howitzers]
4th, 5th, 6th Field Artillery Batteries
102nd Field Artillery (Howitzer) Battery
3rd Field Artillery Brigade [12 x 18 pounders, 4 x 4.5 inch howitzers]
7th, 8th , 9th Field Artillery Batteries
103rd Field Artillery (Howitzer) Battery
21st Field Artillery Brigade [12 x 4.5 inch howitzers]
22nd, 23rd, 24th Field Artillery Batteries
1st Division Ammunition Column
1st Division Trench Mortars
V1A Heavy Trench Mortar Battery [4 x 9.45 inch heavy trench mortars]
X1A,Y1A,Z1A Medium Trench Mortar Batteries [12 x 2 inch medium trench mortars]
1st Division Engineers
1st, 2nd, 3rd Field Companies (New South Wales; Victoria; Outer States)
1st Signal Company
1st Infantry Brigade
1st, 2nd, 3rd, 4th Infantry Battalions (New South Wales)
1st Machine gun Company [16 x Vickers Machineguns]
1st Light Trench Mortar Battery [8 x 3 inch Stokes Mortars]
2nd Infantry Brigade
5th, 6th, 7th , 8th Infantry Battalions (Victoria)
2nd Machinegun Company [16 x Vickers Machineguns]
2nd Light Trench Mortar Battery [8 x 3 inch Stokes Mortars]
3rd Infantry Brigade
9th, 10th, 11th, 12th Infantry Battalions (Queensland; South Australia; Western Australia; Tasmania, South Australia and Western Australia)
3rd Machine gun Company [16 x Vickers Machineguns]
3rd Light Trench Mortar Battery [8 x 3 inch Stokes Mortars]
1st Pioneer Battalion
1st Division Medical Services
1st, 2nd, 3rd Field Ambulances (New South Wales; Victoria; Outer States)
2nd Sanitary Section
1st Salvage Section
1st Divisional Train
1st, 2nd 3rd, 4th Australian Army Service Corps Companies
1st Mobile Veterinary Section
First Division (France, September 1918)
1st Division Artillery
1st Field Artillery Brigade [18 x 18 pounders, 6 x 4.5 inch howitzers]
1st, 2nd, 3rd Field Artillery Batteries
101st Field Artillery (Howitzer) Battery
2nd Field Artillery Brigade [18 x 18 pounders, 6 x 4.5 inch howitzers]
4th, 5th, 6th Field Artillery Batteries
102nd Field Artillery (Howitzer) Battery
1st Division Ammunition Column
1st Division Trench Mortars
1st, 2nd Medium Trench Mortar Batteries [12 x 6 inch Newton Mortars]
1st Division Engineers
1st, 2nd, 3rd Field Companies (New South Wales; Victoria; Outer States)
1st Signal Company
1st Infantry Brigade
1st, 2nd, 3rd, 4th Infantry Battalions (New South Wales)
1st Light Trench Mortar Battery [8 x 3 inch Stokes mortars]
2nd Infantry Brigade
5th, 6th,7th, 8th Infantry Battalions (Victoria)
2nd Light Trench Mortar Battery [8 x 3 inch Stokes mortars]
3rd Infantry Brigade
9th, 10th, 11th, 12th Infantry Battalions (Queensland; South Australia; Western Australia; Tasmania, South Australia and Western Australia)
3rd Light Trench Mortar Battery [8 x 3 inch Stokes mortars]
1st Machine gun Battalion [64 x Vickers Machineguns]
1st, 2nd, 3rd, 21st Machine gun Companies
1st Pioneer Battalion
1st Division Medical Services
1st, 2nd, 3rd Field Ambulances (New South Wales; Victoria; Outer States)
2nd Sanitary Section
1st Salvage Section
1st Division Train
1st, 2nd, 3rd, 4th Australian Army Service Corps Companies
1st Mobile Veterinary Section
Source and for more information : The AIF Order of Battle.