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Archduke Franz Ferdinand gets assassinated by Gavrilo Princip in Serbia by a member of the secret military organization known as the Black Hand -
After the assassination of Franz Ferdinand (who was next n line to the throne), Austria-Hungary declares war on Serbia which ends up bringing more people into the war due to alliances -
A German U-boat torpedoes the Lusitania without warning, which creates tension between Germany and the United States -
The beginning of the longest battle in WW1 starts, the Germans and the French fight it out -
The battle of the Somme was a battle between the British and French against the Germans, starting the bloodiest battle of WWI -
The French and British were able to defend against the Germans ending the battle with over 1 million casualties overall -
After almost a year of fighting the French were successfully able to repel the Germans from Verdun, resulting in a French victory -
The Zimmerman Telegram was an encrypted message that Germany sent Mexico stating if America were to join the war, Mexico would join Germany and help them win. In return for helping, Germany promised land that was lost in the Mexican-American War back. Mexico declined. -
After a lot of German aggression towards America, America decides to join the war on the side of the Allies -
The Bolshevik's overthrow the Czar as leaders of Russia due to them wanting Russia to leave the war. -
Russia signs the Treaty of Brest-Litovsk with Germany in 1918, officially ending their participation in the war -
This was the beginning of one of the last battles of WW1 with Canadian and Allied troops against the Germans -
As the battle ends, the Canadian and Allied troops emerge victorious and repel the Germans back even further -
After 4 years of fighting the Allies end up victorious and sign an armistice with Germany, making them pay for they damage, which they accept -
The Hundred Days Offensive was a string of allied offensive attacks on the Germans which succeeded in making Germany surrender.