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Archduke Franz Ferdinand who was the heir of Austria-Hungary, was traveling the streets of Bosnia when a member of a terrorist group called the black hand assasinated him. -
After giving serbia an ultimatum that was not met, Austria-Hungary declares war on Serbia, ultimately starting world war 1 -
The German government demanded this, and even sent a letter to the Belgian government for a right of free passage which would give them a better attack on France. Belgium was a neutral and Germany gave them an ultimatum to allow them to go through or they would forcefully occupy belgium as an enemy -
An offensive by French and German troops against the German army who invaded Belgium and Eastern France -
Attempting to outflank each other, Allied and German troops were unable to win a decisive victory, leading to the onset of trench warfare. -
German and allied forces clashed in a battle with the first uses of poison gas .The gas attack opened a wide hole in the Allied line, the Germans failed to exploit that advantage.M -
A german u boat sunk the British cruise liner Lusitania and killed many passengers, Including some americans. -
British code breakers intercepted an encrypted message from Zimmermann intended for Heinrich von Eckardt, the German ambassador to Mexico, asking mexico to help fight against the US in the war. -
Due to the sinking of the lusitania and the zimmerman note being intercepted, The US decides to join the fight in WW1 -
On the 11th hour, of the 11th day, of the 11th month, ww1 officially came to an end