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World war I - Coggle Diagram

- - - - Defenders in battle usually held the advantage because of advances in military technology.
        
        One innovation was trench warfare, in which long ditches were dug deep into the ground.
      - In 1916, the Allies launched a major attack at a region in France called Somme.
        
        Approximately 60,000 British soldiers died on the first day of a battle alone.
        
        By the end of the battle, 600,000 soldiers were killed and Allies advanced just seven miles.
- - - - In 1917, United States joined the Allies.
        
        The Treaty of Versailles, signed in 1919, required Germany to accept sole blame for the war an to pay unrealistically huge sums of money to the Allies.
        
        To try to prevent more wars, the Treaty of Versailles also created the League of Nations.
        
        The Treaty of Versailles left many Germans feeling angry and desperate.