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The assassination of Franz Ferdinand was one of the reasons why World War One started. This happened in Sarajevo when he and his wife were wounded by Garvrilo Princip.
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One month after the assassination of Franz Ferdinand Austria-Hungary declares war on Serbia. This is what started World War One.
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The First Battle of the Marne begins. Trench warfare begins as soldiers on both sides dig in. It was the French and British against the Germans.
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The First Battle of Ypres was a battle of the First World War, fought on the Western Front around Ypres, in West Flanders, Belgium, during October and November 1914.
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The Second Battle of Ypres was fought from 22 April – 25 May 1915 for control of Ypres in western Belgium after the First Battle of Ypres the previous autumn. This was the battle that the Germans first used poison gas.
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The sinking of the Lusitania killed 1,198 people. A German U-boat sunk the Lusitania because Germany waged submarine warfare against the U.K. The sinking of the Lusitania killed 128 Americans.
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The battle of Jutland was a major naval battle in World War One.
This battle was between the British Royal Navy's Grand Fleet and the Imperial German Navy's High Seas Fleet. -
President Woodrow Wilson asked Congress for a declaration of war against Germany. Congress granted the request and the United States was formally at war with Germany.
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The Battle of Passchedaele was also known as The Third Battle of Ypres. This battle was fought between the Allies and the German Empire.
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The treaty of Versailles officially ended World War One. This treaty was between Germany and the Allied Powers (Great Britan, France, The Soviet Union, The United States, and China.)
