World War 1

Photo essay

Parties of the war (some)

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Arch Duke Franz Ferdinand was assassinated, set off power keg in Europe.
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British Royal Airforced is created

Guns of WW1

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Submarine warfare started
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Uncle Sam was created to get more recruits for the U.S armed forces

Trench warfare begins

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The Germans started using poison gas

Tank warfare begins

Leaders of WW1 (some)

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The treaty that ended the war