Sinking of the RMS Lusitania

May 7, 1915 · Off the Old Head of Kinsale

Sinking of the British liner Lusitania by a German U-boat off Ireland, which killed 1,198 people, including 128 Americans, and turned US opinion against Germany.

Key people

Woodrow Wilson President of the United States

Participants

Battles 1

World War I July 28, 1914 – November 11, 1918
- Serbian campaign of World War I July 28, 1914 – November 24, 1915
- East African campaign (World War I) August 3, 1914 – November 25, 1918
  - Battle of Tanga November 2–5, 1914
- Battle of Liège August 5–16, 1914
- Battle of Lorraine August 14 – September 7, 1914
- Battle of Gumbinnen August 20, 1914
- Battle of Charleroi August 21–23, 1914
- Battle of the Ardennes August 21–23, 1914
- Battle of Mons August 23, 1914
- Battle of Galicia August 23 – September 11, 1914
- Battle of Le Cateau August 26, 1914
- Battle of Tannenberg August 26–30, 1914
- Battle of Heligoland Bight (1914) August 28, 1914
- Battle of Guise August 29–30, 1914
- First Battle of the Marne September 5–12, 1914
- First Battle of the Masurian Lakes September 7–14, 1914
- First Battle of the Aisne September 13–28, 1914
- Siege of Przemyśl September 16, 1914 – March 22, 1915
- Siege of Antwerp (1914) September 28 – October 10, 1914
- Battle of the Yser October 16–31, 1914
- First Battle of Ypres October 19 – November 22, 1914
- Caucasus campaign November 2, 1914 – October 30, 1918
  - Battle of Sarikamish December 22, 1914 – January 17, 1915
  - Erzurum offensive January 10 – February 16, 1916
  - Battle of Erzincan July 2–25, 1916
- Battle of Tanga November 2–5, 1914
- Battle of Łódź (1914) November 11 – December 6, 1914
- Battle of Sarikamish December 22, 1914 – January 17, 1915
- Battle of Dogger Bank (1915) January 24, 1915
- Gallipoli campaign February 19, 1915 – January 9, 1916
  - Landing at Cape Helles April 25–26, 1915
  - Battle of Sari Bair August 6–21, 1915
  - Landing at Suvla Bay August 6–15, 1915
- Battle of Neuve Chapelle March 10–13, 1915
- Second Battle of Ypres April 22 – May 25, 1915
- Landing at Cape Helles April 25–26, 1915
- Landing at Anzac Cove April 25 – May 3, 1915
- Gorlice–Tarnów offensive May 2 – June 22, 1915
- First Battle of the Isonzo June 23 – July 7, 1915
- Battle of Sari Bair August 6–21, 1915
- Landing at Suvla Bay August 6–15, 1915
- Second Battle of Champagne September 25 – November 6, 1915
- Third Battle of Artois September 25 – November 4, 1915
- Macedonian front October 21, 1915 – September 30, 1918
  - Vardar offensive September 15–29, 1918
- Battle of Ctesiphon (1915) November 22–25, 1915
- Siege of Kut December 7, 1915 – April 29, 1916
- Erzurum offensive January 10 – February 16, 1916
- Battle of Verdun February 21 – December 18, 1916
- Lake Naroch offensive March 18 – April 14, 1916
- Battle of Asiago May 15 – June 10, 1916
- Sykes–Picot Agreement May 16, 1916
- Battle of Jutland May 31 – June 1, 1916
- Brusilov Offensive June 4 – September 20, 1916
- Battle of the Somme July 1 – November 18, 1916
- Battle of Erzincan July 2–25, 1916
- Battle of Romani August 3–5, 1916
- Battle of Gorizia (1916) August 6–17, 1916
- Battle of Bucharest November 25 – December 3, 1916
- First Battle of Gaza March 26, 1917
- Battle of Vimy Ridge April 9–12, 1917
- Battle of Arras (1917) April 9 – May 16, 1917
- Nivelle offensive April 16 – May 9, 1917
- Battle of Messines (1917) June 7–14, 1917
- Kerensky offensive July 1–19, 1917
- Battle of Passchendaele July 31 – November 10, 1917
- Eleventh Battle of the Isonzo August 18 – September 12, 1917
- Riga offensive (1917) September 1–3, 1917
- Battle of Caporetto October 24 – November 19, 1917
- Battle of Beersheba (1917) October 31, 1917
- Third Battle of Gaza November 1–2, 1917
- Battle of Jerusalem (1917) November 17 – December 30, 1917
- Battle of Cambrai (1917) November 20 – December 7, 1917
- Treaty of Brest-Litovsk March 3, 1918
- Operation Michael March 21 – April 5, 1918
- Battle of the Lys (1918) April 9–29, 1918
- Third Battle of the Aisne May 27 – June 6, 1918
- Battle of Cantigny May 28, 1918
- Battle of Belleau Wood June 1–26, 1918
- Second Battle of the Piave River June 15–23, 1918
- Second Battle of the Marne July 15 – August 6, 1918
- Battle of Amiens (1918) August 8–12, 1918
- Battle of Saint-Mihiel September 12–15, 1918
- Battle of Megiddo (1918) September 19–25, 1918
- Meuse–Argonne offensive September 26 – November 11, 1918
- Battle of the St Quentin Canal September 29 – October 2, 1918
- Battle of Sharqat October 23–30, 1918
- Battle of Vittorio Veneto October 24 – November 3, 1918