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First battle of ypres
[First battle of ypres]https://www.history.com/this-day-in-history/first-battle-of-ypres -
United States Enter War
[United States Enter War]https://www.history.com/this-day-in-history/america-enters-world-war-i -
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Zimmerman telegram
[zimmerman Telegram]https://www.history.com/news/what-was-the-zimmermann-telegram -
United Stated Declaration Against Germany
[United Stated Declaration Against Germany]https://www.archives.gov/historical-docs/todays-doc/index.html?dod-date=1211 -
Battle Of Vimy Ridge
[Battle Of Vimy Ridge]https://www.history.com/topics/world-war-i/vimy-ridge-battle -
Battle of Passchendaele
[Battle of Passchendaele]https://www.britannica.com/event/Battle-of-Passchendaele -
United States Declaration of war on Austrailia- Hungary
[United States Declaration of war on Austrailia- Hungary]https://www.loc.gov/law/help/digitized-books/world-war-i-declarations/foreign.php -
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Treaty Of Versailies
[Treaty Of Versailies]https://www.history.com/topics/world-war-i/treaty-of-versailles-1