Related terms:
somme
nivelle
telegram
allies
neutral
vimy ridge
poison gas
wilson
ludendorff
barbed wire
guerra mundial
submarine
hindenburg line
germany
merchant ships
battle of cambrai
zimmermann telegram
treaty of versailles
ottoman empire
united states
Wikipedia sources:
World War I
Woodrow Wilson
Zimmermann Telegram
Unrestricted submarine warfare
Western Front (World War I)
Context for words:
unrestricted
submarine
warfare
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