Answer:
<h2>☆ <u>Hii</u> <u>Friend</u> ☆</h2>
<h3>The antebellum period before the Civil War witnessed rapid population and economic growth and several reform movements aimed at improving lives and fulfilling the principles of the American republic.</h3>
<h3>The United States also experienced contention and deep divisions as slavery and the expansion of territory challenged the political balance of power in the nation.</h3>
<h3>The national debate over slavery and its expansion was at the root of the sectional tensions that, despite the efforts of many, led to the Civil War.</h3>
<h3>Texas, the Mexican War, and Slavery’s Expansion In the two decades after it was adopted in 1820, the Missouri Compromise promised that virtually all the republic’s future expansion westward would be secured from slavery.</h3>
<h3>In fact, however, the compromise only deflected the energies of westward expansion south-westward to the old Spanish domains, where Mexican revolutionaries (following the American example) had overthrown their colonial overlords and created a Mexican Republic in 1823.</h3>
<h3>Achieving political stability proved more difficult for Mexico than for the United States, and in a bid to promote development, the new Mexican government encouraged American immigrants to settle in the northernmost province of Texas in the 1820s. Mexico soon regretted the decision.</h3>
<h3>American settlers arrived in alarming numbers—some 20,000 by the end of the decade—and showed no inclination to either assimilate themselves to Mexican culture or obey Mexican laws banning slavery.</h3>
<h3>In 1835, these nordamericanos rose in revolt, and after a gallant but bloody defeat at the Alamo in March 1836, they won a resounding victory over Mexican general Antonio López de Santa Anna at San Jacinto on April 21, 1836.</h3>
