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this is the allaince that france, britain, and italy promising to come to eachotheres aid if war came about.
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He was assassinated in sarajevo, serbia. Austria Hungry declared war and pressured its allies to join them. The alliance sytem brought more and more antions into the conflict. This ultimatly caused WWI
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Austria Hungry declares war on serbia due to the assassination od Duke Franz Ferdinand
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Austria hungry got the allaince of germany and on the way to serbia they had to get through belgium. Belgium didnt grant them access so they went through by force.
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A u-boat sank a friendly ship carrying U.S passangers and thsi outraged the U.S and its people.
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this was the first battle of the war and germany was on the offense to start with.
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This was a note that the germans sent to the mexican goverment saying that if they joined germany in the war in return germany will give mexico all the land they lost in the spanish american war.
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The U.S was very angry after the zimmerman note but after germay attacked yet another netrual ship killing U.S passanergers, along with russias lost of monarchy they felt it was time ti join the war
