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President Polk offers Mexicans $25 million in total for both California and New Mexico.
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James K Polk, a believer in the so called "Manifest Destiny" where the U.S. assumes presidency in the united, begins to advocate for the annexation of Texas itself
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in April 5, 1845, Mexican president Herrera sent Lopez de Santa Anna to Cuba, forcing him into an exile due to his extent of corruption and became known for his treason and confiscated estates.
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The Yucatan at the start of the year begins to declare their own independence from Mexico and their neutrality from the war in the United states, letting them free from the war.
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the Siege of Fort Brown in texas would occur, lasting up to six days near Brownsville Texas. where the Americans would have victory over the Mexicans withdrawing. This siege marking the beginning of active campaigning by the armies of the United states and Mexico.
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The United States senate voted forty to two to go to war with Mexico. President Polk now accusing Mexican troops of having attacking Americans on US soil, north of Rio Grande. But Mexico retaliates by having claimed the land already and accused the American Military of invading.
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a short lived independence rebellion that had precipitated the American Settlers in California's Sacramento Valley against Mexican authorities.