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austria-hungary declares war on siberia
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Period: to
WW1
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The First Battle of the Marne begins
Trench warfare begins as soldiers on both sides dig in -
Germany declares a "war zone" around Great Britain
essentially effecting a submarine blockade where even neutral merchant vessels were to be potential targets -
Tsar Nicholas II takes personal control over Russia's armies
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The Battle of the Somme begins.
During the Battle of the Somme, tanks are first introduced into battle -
Germany sends the secret Zimmerman Telegram to Mexico
in an effort to entice Mexico to join the war. The British intercept and decipher the coded message -
The United States declares war on Germany
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The Bolsheviks successfully overthrow the Russian government.
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Germany launches the Spring Offensive
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German flying ace, Baron Manfred von Richthofen (more commonly known as the Red Baron), is shot down
