According to First World War.com, Britannica Online Encyclopedia
and
"The First World War" by John Keegan
Battle of Liege
Opened 5 August 1914
Battle of the Frontiers
Opened 5 August 1914
Battle of Mulhouse
Opened 7 August 1914
Battle of Haelen
Opened 12 August 1914
Invasion of Lorraine
Opened 14 August 1914
Battle of Stalluponen
Opened 17 August 1914
Battle of Gumbinnen
Opened 20 August 1914
Battle of the Ardennes
Opened 21 August 1914
Battle of Charleroi
Opened 21 August 1914
Siege of Namur
Opened 21 August 1914
Battle of Mons
Opened 23 August 1914
Capture of Dinant
Opened 23 August 1914
Siege of Maubeuge
Opened 25 August 1914
Destruction of Louvain
Opened 25 August 1914
Battle of Le Cateau
Opened 26 August 1914
Battle of Tannenberg
Opened 26 August 1914
Battle of Heligoland Bight
Opened 28 August 1914
Battle of Guise
Opened 29 August 1914
Siege of Tsingtao
Opened 2 September 1914
First Battle of the Marne
Opened 6 September 1914
First Battle of the Masurian Lakes
Opened 9 September 1914
Battle of Bita Paka
Opened 11 September 1914
First Battle of the Aisne
Opened 12 September 1914
First Battle of Albert
Opened 25 September 1914
Battle of Sandfontein
Opened 26 September 1914
Siege of Antwerp
Opened 28 September 1914
First Battle of Arras
Opened 1 October 1914
First Battle of Ypres
Opened 14 October 1914
First Battle of Ypres
(Second Account), Opened 14 October 1914
Battle of the Yser
Opened 18 October 1914
Battle of Coronel
Opened 1 November 1914
Battle of Tanga
Opened 3 November 1914
Capture of Basra
Opened 5 November 1914
Battle of Qurna
Opened 3 December 1914
Battle of the Falkland Islands
Opened 8 December 1914
Raid on Scarborough and Hartlepool
Opened 16 December 1914
Battle of Givenchy
Opened 18 December 1914
First Battle of Champagne
Opened 20 December 1914
Battle of Dogger Bank
Opened 24 January 1915
Battle of Bolimov
Opened 31 January 1915
Defence of the Suez Canal
Opened 3 February 1915
Second Battle of the Masurian Lakes
Opened 7 February 1915
Initial Dardanelles Bombardment
Opened 19 February 1915
Battle of Neuve-Chapelle
Opened 10 March 1915
Attempt to Force the Narrows
Opened 18 March 1915
Battle of Shaiba
Opened 11 April 1915
Second Battle of Ypres
Opened 22 April 1915
Landings at Helles & Anzac Cove
Opened 25 April 1915
First Battle of Krithia
Opened 28 April 1915
Counter-attack at Eski Hissarlik
Opened 1 May 1915
Second Battle of Krithia
Opened 6 May 1915
Battle of Festubert
Opened 15 May 1915
Turkish attack at Anzac Cove
Opened 19 May 1915
Capture of Amara
Opened 31 May 1915
Third Battle of Krithia
Opened 4 June 1915
Battles of the Isonzo
Opened June 1915-October 1915
First Battle of the Isonzo
Opened 23 June 1915
Battle of Nasiriyeh
Opened 27 June 1915
Battle of Gully Ravine
Opened 28 June 1915
Attack on Achi Baba
Opened 12 July 1915
Second Battle of the Isonzo
Opened 18 July 1915
Landings at Suvla Bay
Opened 6 August 1915
Battle of Lone Pine
Opened 6 August 1915
Battle of Sari Bair
Opened 6 August 1915
Battle of the Nek
Opened 6 August 1915
Battle of Hill 60
Opened 21 August 1915
Battle of Scimitar Hill
Opened 21 August 1915
Battle of Loos
Opened 25 September 1915
Capture of Kut-al-Amara
Opened 28 September 1915
Battle of Es Sinn
Opened 28 September 1915
Third Battle of the Isonzo
Opened 18 October 1915
Fourth Battle of the Isonzo
Opened 10 November 1915
Battle of Ctesiphon
Opened 2 November 1915
Siege of Kut-al-Amara
Opened 7 December 1915
Evacuation of Gallipoli
Opened 18 December 1915
Battle of Sheikh Sa'ad
Opened 6 January 1916
Battle of the Wadi
Opened 13 January 1916
Battle of Hanna
Opened 21 January 1916
Battle of Verdun
Opened 21 February 1916
Battle of Dujaila
Opened 8 March 1916
Fifth Battle of the Isonzo
Opened 9 March 1916
Battle of Lake Naroch
Opened 18 March 1916
First Battle of Kut
Opened 5 April 1916
Battle of Asiago
Opened 15 May 1916
Trentino Offensive
Opened 15 May 1916
Battle of Jutland
Opened 31 May 1916
Battle of Lutsk
Opened 4 June 1916
Battle of Khanaqin
Opened June 1916
Battle of the Somme
Opened 1 July 1916
Battle of Bazentin Ridge
Opened 14 July 1916
Battle of Delville Wood
Opened 15 July 1916
Battle of Pozieres Ridge
Opened 23 July 1916
Battle of Romani
Opened 3 August 1916
Sixth Battle of the Isonzo
Opened 6 August 1916
Battle of Gorizia
Opened 6 August 1916
Battle of Guillemont
Opened 3 September 1916
Seventh Battle of the Isonzo
Opened 14 September 1916
Battle of Flers-Courcelette
Opened 15 September 1916
Eighth Battle of the Isonzo
Opened 10 October 1916
Ninth Battle of the Isonzo
Opened 1 November 1916
Second Battle of Kut
Opened 13 December 1916
Battle of Khadairi Bend
Opened 9 January 1917
Battle of Nahr-al-Kalek
Opened 26 February 1917
Capture of Baghdad
Opened 11 March 1917
Samarrah Offensive
Opened 13 March 1917
Seizure of Falluja
Opened 19 March 1917
First Battle of Gaza
Opened 26 March 1917
Battle of Jebel Hamlin
Opened 25 March 1917
Battle of Vimy Ridge
Opened 9 April 1917
Battle of Shiala
Opened 11 April 1917
Second Battle of the Aisne
Opened 16 April 1917
Second Battle of Gaza
Opened 17 April 1917
Battle of Istabulat
Opened 21 April 1917
Battle of the Boot
Opened 30 April 1917
Tenth Battle of the Isonzo
Opened 12 May 1917
Battle of Otranto Straits
Opened 14 May 1917
Battle of Messines
Opened 7 June 1917
Third Battle of Ypres
Opened 31 July 1917
Third Battle of Ypres (2)
Opened 31 July 1917
Battle of Passchendaele
Opened 31 July 1917
Eleventh Battle of the Isonzo
Opened 19 August 1917
Battle of Ramadi
Opened 28 September 1917
Twelfth Battle of the Isonzo
Opened 24 October 1917
Battle of Caporetto
Opened 24 October 1917
Third Battle of Gaza
Opened 31 October 1917
Battle of Beersheba
Opened 31 October 1917
Capture of Tikrit
Opened 5 November 1917
Battle of Mughar Ridge
Opened 13 November 1917
Battle of Cambrai
Opened 20 November 1917
Fall of Jerusalem
Opened 8 December 1917
Raid on Zeebrugge
Opened 23 April 1918
Third Battle of the Aisne
Opened 27 May 1918
Battle of Cantigny
Opened 28 May 1918
Battle of Chateau-Thierry
Opened 3 June 1918
Battle of Belleau Wood
Opened 6 June 1918
Battle of the Piave River
Opened 15 June 1918
Battle of Le Hamel
Opened 4 July 1918
Second Battle of the Marne
Opened 15 July 1918
Battle of Havrincourt
Opened 12 September 1918
Battle of Epehy
Opened 18 September 1918
Battle of Vittorio Veneto
Opened 23 October 1918
Battle of Sharqat
Opened 29 October 1918