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In 1914 Archduke Franz Ferdinand of Austria and his wife were assassinated by Gavrilo Princip while being in Sarajevo. The purpose of this assassination was for the Austria-Hungarian rule to set free Bosnia and Herzegovina and establish a South Slav (Yugoslav) state. The July Crisis was happening around this time and a single action caused more tensions among the European countries. The assassination of Franz led to Austria-Hungary declaring war on Serbia. In conclusion, this assassination started World War I.

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The Assassination of Archduke Franz Ferdinand | HISTORY

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On the eve of the assassination’s centennial, find out how a teenage Serbian nationalist provided the spark for World War I.

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Trench Warfare was used for protection during World War I. It was developed by Sébastien Le Prestre de Vauban. Its goal was to protect the soldiers while the attacks were happening. Heavy firepower, machine guns, grenades, and poison gas were used at this time. The trenches helped with blocking all of these threats to the soldiers.

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Trench warfare | Definition, History, & Facts

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Trench warfare, combat in which armies attack, counterattack, and defend from relatively permanent systems of trenches dug into the ground. Trench warfare is resorted to when the superior firepower of the defense compels the opposing forces to ‘dig in,’ sacrificing their mobility in order to gain pr…

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The Battle of Marne was a battle that was fought from September 6 to September 13, 1914. The battle happened in Marne River in France. This battle was important because the French and British armies stopped the German army from moving further into France. The Germans had hoped ti wub the war quickly, but they failed. Consequently, both sides started building trenches, and the war became long and hard to win.

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The sinking of the Lusitania happened on May 7, 1915 during World War I. It was caused by a German submarine that sank the ship. Almost 1,200 people lost their lives. This event made the United States angry and gave the U.S another reason to join the war.

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The Battle of Somme occurred from July 1 to November 18, 1916 during World War I. This battle was between Great Britain and French against Germany in Northern France. The main purpose of this battle was to help the French army by attacking the German army in another place. British and French also wanted to break through the German lines and win the land. They thought this was going to end the war, but sadly, the battle caused many deaths and just small land gains.

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The Battle of Verdun took place from February 21 to December 18, 1916 in the hills north of the town of Verdun during World War I, between France and Germany. It is known as the bloodiest and longest battles of the war.

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The Zimmerman Telegram was a secret coded message from German Minister Arthur Zimmermann that was intercepted by the British Naval Intelligence. In that telegram Germany was inviting Mexico to join Germany in exchange for United States territory. The Zimmerman Telegram contributed to the United States entering the war.

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Woodrow Wilson was the president of United States during World War I. On January 18, 1918. president Woodrow Wilson proposed a 14-point program to achieve world peace. The points included ideas like no secret treaties, freedom of the seas, and the creation of the League of Nations to help keep peace in the future. His goal was to prevent another war and make the world safe.

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The Armistice was signed on November 11, 1918. It was an agreement between Germany and the Allied powers to stop fighting and end the war. The fighting ended at 11 a.m.

This armistice marked the end of World War I. The Treaty of Versailles was signed later in 1919.

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The Treaty of Versailles was signed on June 28, 1919, it officially ended World War I. It was an agreement between the Allied Powers and Germany. The Treaty blamed Germany for the war, made them pay the war reparations, and give up some of their land. Additionally, the League of Nations was created to help keep peace.