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the Mexican american war was on April 25 1846 - February 2 1848 . The Mexican American war was caused by the US annexation of Texas in 1845 the reason why was because Americans wanted to push for its territorial expansion . This affected California,Nevada,Utah,New mexico and parts of Arizona Colorado Wyoming Kansas and Oklahoma this event mostly affected vast expansion of US territory.

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This event took place on May 25 1856 on this day a total of 5 people died It was James Doyle and his two sons William who 22 years old and Dury who 20 years old and Allen Wilkerson and William Sherman .This happen because of the Kanses act over the issues of slavery this made free states to forces pro slavery this led to John brown and his follower to violently go against it .

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The Raid on Harper ferry happen on October 16 1859 this happened because slaves started a rebellion the federal army raiding the Harper ferry in west Virginia . the affected paths of destruction that wrecked the town and this made the towns people flee the town . the effects of this was an polarized nation it influenced the 1860 president election it strengthen the abolitionist movement forced American to reconsider slavery and many more thing so this had many impacts on thing

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This is January 1 1863 this declared all persons held as slaves with rebellions states and hence forward shall be free . this affected enslaved people living in confederates states that was still in rebellion against the union during the civil war , freed slaves and changed the war allowed African Americans to be in the army influced the 13th amendment and many more things

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This was on July 1 1863 the battle of the gettburgs was a 3 day fifth during the American civil war it was a fight between the union and confederate forces in Pennsylvania . it was caused because union major general George made army of the Potomac they defeated the attacks by confederate general Robert E Lee of the northern Virgina hating the invasion by Lee and it forced him to retreat . They union ended up winning and the gettysburg ended up achieving a new birth of freedom the will get rid of slavery

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On December 6 1865 the 13 amendment was passed the amendment said that nether slavery nor involuntary servitude except as a punishment for crime where of the party shall have duly any place subject to their jurisdiction . this was caused because the emancipation proclamation is not guaratee slaves freedom so they made the 13 amendment that guaratee the freedom of the slaves . The effect from the amendment was that they slave are free so it ended slavery Banned involuntary servitude granted citizenship it guarenteed equal protection and expanded civil right and many more great thing

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On July 9 1868 the 14 amendment was made this amendment granted the protection of citizen rights and grant citizenship to all people born in the United States and it extents the bill of rights . The 14 amendment was put in to gurrautee citizenship for all citizen of the US it was to undo Black codes and to protect civil liberties of slave that were recently freed slaves . some effect from this amendment citizenship to people that were born in the US including formerly enslaved people had equal protection and due process which prohibited states from depriving any person of life, Liberty or property without the due process law

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The Wounded knee massacre happened on December 29 1890 This massacre was a killing of 3 hundred Lakota people states army . the wounded knee was caused by many things One was The Fear of the Ghost dance many alarmed by the Ghost dance the killing of the sitting bull and the westward expansion and government policy . After the event the flew of the Sioux Surcivars of the battle fled the 7th cavalry and the official army awarded a medal of honor to the 20 soldiers