The Battle of Liège was the first major battle of World War I, taking place from August 5 to 16, 1914, in the Belgian city of Liège.

Operation Michael was a German offensive launched on March 21, 1918, with the aim of breaking through Allied lines and ending the war.

The Battle of Ypres, also known as the Second Battle of Ypres, was the first time poison gas was used in warfare, specifically chlorine gas, on April 22, 1915.

The Hundred Days Offensive was a series of Allied offensives launched in the final months of World War I, from August 8 to November 11, 1918, which ultimately led to the armistice and the end of the war.

The Battle of Verdun, lasting from February 21 to December 18, 1916, was the longest and one of the bloodiest battles of World War I, resulting in hundreds of thousands of casualties.

The Battle of Jutland, fought on May 31 and June 1, 1916, was the largest naval battle of World War I and the only full-scale clash of battleships between the British Royal Navy and the Imperial German Navy.

The Battle of Cambrai, fought from November 20 to December 3, 1917, was the first large-scale use of tanks in warfare, with over 400 British tanks deployed.

The Nivelle Offensive, also known as the Chemin des Dames Offensive, was a French offensive launched in April 1917 with the aim of breaking through German lines and ending the war.

The Battle of Arras, fought from April 9 to May 16, 1917, was the first time flamethrowers were used in warfare, specifically by the German forces.

The Battle of Amiens, fought from August 8 to 11, 1918, was an Allied offensive that aimed to capture the strategically important city of Amiens, marking the beginning of the Hundred Days Offensive.

The Battle of Gallipoli, fought from April 25, 1915, to January 9, 1916, was the first large-scale use of aircraft in warfare, with both sides using aircraft for reconnaissance, bombing, and air-to-air combat.

The Battle of St. Mihiel, fought from September 12 to 16, 1918, was an Allied offensive that aimed to capture the strategically important city of St. Mihiel, as part of the larger Meuse-Argonne Offensive.

The Battle of Jutland, fought on May 31 and June 1, 1916, was the first large-scale use of submarines in warfare, with both sides deploying submarines to attack enemy ships.

The Battle of Meuse-Argonne, fought from September 26 to November 11, 1918, was the largest and bloodiest battle of World War I, involving over 1 million American troops and resulting in hundreds of thousands of casualties.

The Battle of Ypres, also known as the Second Battle of Ypres, was the first large-scale use of chemical weapons in warfare, specifically chlorine gas, on April 22, 1915.