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Assassination of Archduke Franz Ferdinand
Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo. The killings sparked a chain of events that led to the outbreak of World War I. -
Trench Warfare, Poison Gas, and Machine Guns
Trenches were used as protective defenses and strategy. Trench warfare caused enormous numbers of casualties.The machine gun emerged as a decisive weapon during World War I. Poisonous gas was used as a method to end the stalemate of trench warfare. -
Sinking of the Lusitania
Lusitania, British ocean liner, the sinking by a German U-boat on 1915, contributed indirectly to the entry of the United States into World War I. -
Zimmerman Telegram
The Zimmerman Telegram was a secret diplomatic communication from the German Foreign Office that proposed a military alliance between Germany and Mexico. If the Mexicans joined the war on the German side by attacking America, Mexico would recover Texas, Arizona, and New Mexico -
Russian Revolution
The Russian Revolution was a period of political and social revolution across the territory of the Russian Empire which started with the abolishment of monarchy and concluded with the establishment of the Soviet Union by the Bolsheviks and the end of the civil war -
US Entry into WW1
The date of US entry into WW1 was April 6, 1917 when the nation was drawn into World War 1 on the side of the Allies. The United States of America entered the conflict, two and a half years after the war had begun. -
Battle of Argonne Forest
The Battle of Argonne Forest was part of what became known as the Meuse-Argonne Offensive, the last battle of World War I . It was a massive attack along the whole line, with the immediate goal of reaching the railroad junction as Sedan. -
Armistice
The armistice signed at Le Francport near Compiègne that ended fighting on land, sea and air in World War I between the Allies and their opponent, Germany. -
Woodrow Wilson 14 Points
A statement of principles for peace that was to be used for peace negotiations in order to end World War I. -
Treaty of Versailles
The most important of the peace treaties that brought World War I to an end. The Treaty ended the state of war between Germany and the Allied Powers.
