This is a List of military engagements of World War I which encompasses land, naval, and air engagements as well as campaigns, operations, defensive lines and sieges. Campaigns generally refer to broader strategic operations conducted over a large bit of territory and over a long period of time. Battles generally refer to short periods of intense combat localised to a specific area and over a specific period of time. However, use of the terms in naming such events is not consistent. For example, the First Battle of the Atlantic was more or less an entire theatre of war, and the so-called battle lasted for the duration of the entire war. Another example is the Battle of Gallipoli (also called the "Dardanelles Campaign"), which in fact was a number of battles fought between 1915 and 1916.

Europe
1914
1915
1916
1917
1918

Battle of Liège
Battle of the Frontiers
Battle of Lorraine
Battle of Charleroi, also known as the First Battle of the Sambre
Battle of the Ardennes
Allied Great Retreat
Battle of Mons
Battle of St. Quentin, also called the Battle of Guise
First Battle of the Marne
Race to the Sea
First Battle of the Aisne
Battle of Loos
First Battle of Albert
First Battle of Arras
Battle of the Yser
Siege of Antwerp
Siege of Namur
Siege of Maubeuge
Battle of Le Cateau
First Battle of Ypres
First Battle of Champagne
Battle of Neuve Chapelle
Second Battle of Ypres
Second Battle of Artois
Battle of Loos
Second Battle of Champagne
Battle of Verdun
Battle of Hulluch
Battle of the Somme
Battle of Fromelles
Battle of Pozières
Battle of Ginchy
Nivelle Offensive
Battle of Arras (1917)
Battle of Vimy Ridge
Second Battle of the Aisne, also called the Third Battle of Champagne
Battle of Messines
Battle of Passchendaele, also called the Third Battle of Ypres
Battle of Cambrai (1917)
German Spring Offensive
First Battle of the Somme (1918), also known as the Battle of St. Quentin or the Second Battle of the Somme (to distinguish it from the 1916 battle)
Battle of the Lys, also known as the Fourth Battle of Ypres and the Battle of Estaires
Third Battle of the Aisne
Battle of Cantigny
Battle of Belleau Wood
Second Battle of the Marne
Battle of Château-Thierry (1918)
Hundred Days Offensive
Battle of Amiens
Second Battle of the Somme (1918), also known as the Third Battle of the Somme
Battle of Saint-Mihiel
Battle of Epéhy
Battle of the Hindenburg Line
Meuse-Argonne Offensive, also called the Battle of the Argonne Forest
Battle of Cambrai (1918)
Battle of the Sambre (1918), also known as the Second Battle of the Sambre Western Front

First Battle of the Isonzo
Second Battle of the Isonzo
Third Battle of the Isonzo
Fourth Battle of the Isonzo
Fifth Battle of the Isonzo
Trentino Offensive or the "Battle of Asiago"
Sixth Battle of the Isonzo or the "Battle of Gorizia"
Seventh Battle of the Isonzo
Eighth Battle of the Isonzo
Ninth Battle of the Isonzo
Tenth Battle of the Isonzo
Eleventh Battle of the Isonzo
Twelfth Battle of the Isonzo or the "Battle of Caporetto"
Battle of the Piave River
Battle of Vittorio Veneto Italian Campaign

Battle of Stalluponen
Battle of Gumbinnen
Battle of Tannenberg
Battle of Lemberg (1914)
First Battle of the Masurian Lakes
Siege of Przemysl
Battle of the Vistula River
Battle of Łódź (1914)
Battle of Bolimov
Second Battle of the Masurian Lakes
Battle of Warsaw (1915)
Brusilov Offensive
Kerensky Offensive
Battle of Mărăşti
Battle of Mărăşeşti
Russian Revolution Eastern Front

Battle of Sarikamis
Battle of Malazgirt (1915)
Battle of Kara Killisse
Battle of Koprukoy
Battle of Erzurum
Battle of Erzincan Caucasus Campaign

Battle of Cer
Battle of Kolubara
Battle of Morava
Battle of Kosovo (1915)
Battle of Ovche Pole Serbian Campaign
The Battle of Gallipoli (also called the "Dardanelles Campaign"), was in fact a number of battles fought between 1915 and 1916.

Battle of the Nek
Battle of Chunuk Bair
Battle of Gully Ravine
Battle of Hill 60 (Gallipoli)
Battle of Krithia Vineyard
Battle of Lone Pine
Battle of Sari Bair
Battle of Scimitar Hill
Landing at Anzac Cove
Landing at Cape Helles
First Battle of Krithia
Second Battle of Krithia
Third Battle of Krithia
Naval operations in the Dardanelles Campaign Gallipoli

Sinai and Palestine Campaign

Fao Landing
Fall of Basra
Battle of Qurna
Capture of Amara
Battle of Nasiriyeh
Battle of Es Sinn
Battle of Ctesiphon
Siege of Kut

• Battle of Sheikh Sa'ad
  Battle of the Wadi
  Battle of Hanna
  Battle of Dujaila Redoubt
  First Battle of Kut
  Battle of Khanaqin
  Second Battle of Kut
  Fall of Baghdad
  Samarrah Offensive
  Battle of Jebel Hamlin
  Battle of Istabulat
  Battle of Ramadi
  Capture of Tikrit
  Battle of Sharqat Mesopotamian Campaign
  None currently listed
  
  South Arabian Campaign
  
  Fall of Cameroon
  Fall of German West Africa (Namibia)
  Battle of Killimanjaro
  Fall of Togo
  Battle of Tanga or Battle of the Bees
  Battle of Ruji Delta
  Battle of Longido African Campaign
  See also: Naval warfare of World War I
  
  Naval engagements
  
  First Battle of Heligoland Bight (1914)
  Battle of the Falkland Islands (1914)
  Raid on Scarborough, Hartlepool and Whitby (1914)
  Battle of Dogger Bank (1915)
  Otranto Barrage (1915-1918)
  Battle of Jutland (1916)
  Battle of Dover Strait (1917)
  Second Battle of Heligoland Bight (1917)
  Zeebrugge Raid (1918) Atlantic Theatre
  
  Pursuit of Goeben and Breslau (1914)
  Naval operations in the Dardanelles Campaign (1915-1916) Mediterranean
  
  Battle of Friju Island (1914)
  Battle of New Guinea (Kaiser Wilhelmland)
  Battle of Tsingtao (1914)
  Battle of Penang (1914)
  Battle of Coronel (1914)
  Battle of Cocos (1914)
  Battle of the Falkland Islands (1914) Pacific Theatre
  World War I was the first war to see major use of planes for offensive, defensive and reconnaissance operations, and both the Entente Powers and the Central Powers used planes extensively. Almost as soon as they were invented, planes were drafted for military service.
  See also the following articles:
  
  Aviation in World War I
  Aviation history (1914-1918)
  Flying aces
  List of World War I flying aces
  World War I aircraft
  Zeppelins in World War I Contemporary wars
  
  Mexican Revolution (1910-1920)
  First Balkan War (1912-13)
  Second Balkan War (1913)
  Maritz Rebellion (1914-15)
  Easter Rising (1916)