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Texas is added into the United states. This act was one of his major campain promises and mark a huge step towards Manest Destiny.

I think this event was a success because it did make a great impact on the rest of the events after

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1846: Establishment of the Smithsonian Institution

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1846: Establishment of the Smithsonian Institution

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The Smithsonian Institution is established with funds bequeathed by James Smithson. Polk's administration oversees this, leading to the creation of one of the largest museum and research complexes in the world.

This is a success because it has now made one of the largest muesuems that are nows todays history.

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Polk negotiates the Oregon Treaty with Great Britain, successfully outlining the northern border of the Oregon Territory at the 49th parallel. This demonstrates his dedication to territorial expansion while avoiding conflict with Britain.

This is a success because he managed to avoid what could have turned out bad with the britains

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Polk carries out significant reforms in the Post Office Department, improving the quality of mail delivery across the growing nation. This directly impacts the everyday lives of Americans. This was a success because it was an major development that has made a big impact on history.

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The Mexican-American War ends with the signing of the Treaty of Guadalupe Hidalgo, with Mexico ceding a big portion of its land to the U.S. This treaty is a landmark achievement of Polk's presidency, dramatically expanding U.S. territory. This was successfull because it was an important mark in history that also stopped the American-Mexican War.