Major Events of WWI
Battle of Somme
The British and the Germans were the primary people who fought the Battle of Somme, near the Somme River in France in 1916. It was a British offensive aimed to weaken Gemany and get pressure off France. The death toll was huge and the British got creamed. As a result, both armies were weakened after the battle, and the British began to change their tactics. This battle is remembered because it was one of the bloodiest in history.
Battle of Gallipoli
The Battle of the Gallipoli involved a campaign by the British and French navies that ended in a battle on the Gallipoli peninsula against the Ottomans on April 25, 1915. The campaign's aim was to secure a sea route, and the battle itself was to capture Constantinople (which would allow them to do the former objective). The British and French got creamed once again. The Battle of Gallipoli is significant because it drew the Ottoman Empire into the war.
Battle of the Marne
September 6, 1914 was the start of the Battle of the Marne, northeast of Paris. The French and British dug trenches there to stop the German advance. The French and British won. This battle is significant because it was the start of trench warfare.
The Schlieffen Plan was the plan of a German general of how to mobilize troops in case of war. This plan involved a quick takeover of France and is what drew France into WWI.
The Bolshevik Revolution was a revolution/civil war in Russia in 1917, in which the Bolsheviks eventually took over the government. This is historically significant because it turned Russia into a communist state and took them out of the war.