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Nullification crisis
The nullification Crisis of 1832-33 unfolded when South Carolina,under the leadership of John C.Calhoun.declared that federal tariffs imposed in 1828 and 1832 were invalid within its state,effectively refusing to comply with them.this action sparked a major complict with president Andrew Jackson,who strongly asserted the authority of the federal government and threatened to use force to enforce the tariffs,leading to a standoff over the principle of state’rights versus national supremacy. -
The Mexican-American war
The Mexican-amecan war, 1846-1848 was a pivotal conflict that significantly shaped US history, leading to the acquisition of vast territories and intensifying debates over slavery and westward expansion. -
Bleeding Kansas(1854-1861
“Bleedind Kansas”that’s is refers to the period of violent and 185,stemming from the debate over slavery and the territory’s potential statehood as either a free or slave state,which escalated into a mini civil war and foreshadowed the larger conflict to come. -
The Kansas-Nebraska act(1854)
This act, introduced by Senator Stephen Douglas, repealed the Missouri compromise, which had prohibited slavery in the territories north of the 36 digree 30 parallel. -
The Dred Scott Supreme Court decision
Missouri’s Dred Scott Case,1846-1857.in its 1857 decision that stunned the nation,the United States Supreme Court upheld slavery in United state territories,dernied the legality of back citizenship in America,and declared the Missouri compromise to be unconditional. -
John Brown's raid on Harpers Ferry 1859
John brown's raid on harpers ferry in 1859 was unsuccessful,it significantly intensified the debate over slavery and further radicalized the abolitionist movement pushing some towards more militant tactics.but the raid was quickly suppressed by local militias and federal troops, and brown was captured and executed.