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The United States won the Mexican-American War through superior military organization, stronger logistics, and well-trained officers who executed coordinated campaigns across multiple regions. American forces captured key territories—most importantly Mexico City in 1847—breaking Mexico’s ability to continue resisting. Additionally, Mexico suffered from political instability, weak military resources, and internal divisions, which made it difficult to sustain a prolonged war against the United States.

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The U.S. had experienced generals like Zachary Taylor and Winfield Scott, who had trained soldiers and clear battle plans. Taylor won major victories in northern Mexico at Palo Alto, Resaca de la Palma, and Buena Vista. Scott led troops on an amphibious landing at Veracruz and then marched inland to capture Mexico City.

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While Mexico had more soldiers, better weapons, and the full support of the British Crown they also had weak leadership and low morale among troops. Santa Anna was not a great leader and was a terrible General and could not win any battles. The US swiftly dispatched the Mexican army and ended the war only two years after it began.

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Despite of having only few military (around 5,000), they won against the battle because of being enthusiastic and high morale, with good leaders such as Zachary Taylor and Winfield Scott. In contrast, the Mexico lost because of poor morale and weak leadership led by Santa Anna. Despite of having 20,000 troops and financially supported by Great Britain.

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The Mexican Army had The Worst leadership and poor morale. Santa Anna made a series of poor strategic decisions. The US army, however, had a very high morale and was composed of very enthusiastic volunteers from southern and mid-western states. They also had very impressive leadership - Zach "Old Rough and Ready" Taylor and Winfield "Old Fuss and Feathers" Scott. In 1847, 5,000 American troops defeated 20,000 Mexican troops at Buena Vista. Shortly after US troops marched into Mexico City and launched an assault which resulted in the collapse of the Mexican government. This led to negotiations at Guadolupe Hidalgo.

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The Mexican-American War was caused by long-standing territorial disputes between the United States and Mexico, especially after the U.S. annexation of Texas in 1845, which Mexico still considered its own territory. President James K. Polk’s strong desire for westward expansion, including acquiring California and New Mexico, intensified tensions and pushed the United States toward conflict. When U.S. and Mexican troops clashed in the disputed Rio Grande region, the confrontation provided the immediate spark that led to full-scale war.

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Me when I make a post about the Mexican War

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Me when I make a post about the Mexican War

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The Mexican War was sparked by the election of 1844. The annexation of Texas caused Mexico to immediately break civil communication with the United States. On May 9, the United States and Mexico fought in a small “skirmish” along the Rio Grande River in an area which both the United States and Mexico claimed to own. Since this happened, Polk asked Congress for a declaration of war on May 13, 1846, on the grounds that Mexico had invaded the US and spilled American blood. The United States then defeated Mexico really easily, which surprised everyone. -Moose, on the cover of Vogue

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The Annexation of Texas. Texas had been part of Mexico, but it rebelled and became an independent republic in 1836. When the United States annexed (took in) Texas in 1845, Mexico was furious. They still claimed Texas as their territory. The border between the two countries became a major dispute. Desire for More. Many Americans believed in Manifest Destiny. The idea that the U.S. was destined by God to expand west to the Pacific Ocean. They wanted to gain California and New Mexico from Mexico to complete that vision.

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Tejanos and Americans who settled in Texas (Texans) were content with the 1824 Mexican Constitution which allowed for a good bit of self-government. In 1834, newly elected President Santa Anna advocated for scrapping this constitution in favor of a new one with stronger centralize govt (which meant less self govt). This caused the Texans to rebel and seek independence. The US eventually decided to annex TX. Santa Anna decided to ignore this which resulted in both countries going to war.

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In 1846, Mexico rejected the US offer of $25 million for California, territorial dispute over the Texas border, the U.S. and Mexico claimed the Rio Grande, and President Polk's desire to acquire California and New Mexico. In May 13, 1846, Polk declared war because of Mexico's invasion.

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GOLD RUSH! After gold was discovered in California tens of thousands rushed west. this was the California Gold Rush. Mining towns like San Francisco, Sacramento, and Deadwood grew almost overnight. The boom brought wealth to some, but also pollution, lawlessness, and the removal of Native peoples.

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Western expansion refers to the movement of American settlers westward across the continent during the 18th and 19th centuries, driven by the search for land, resources, and new economic opportunities. This process was supported by government policies, military actions, and beliefs like Manifest Destiny, which framed expansion as both inevitable and justified. However, western expansion resulted in the displacement of Native American nations, conflicts with foreign powers, and major political tensions over slavery and territorial control.

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The united States paved the groundwork for westward expansion early in the countries life with the Louisiana Purchase in 1803. Manifest destiny really set forth settlement out west, a famous route out west was called the Oregon Trail.

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Western Expansion refers to how all settlers, such as farmers and miners, moved West along the United States in order to gain more territory. It was also related to the Native Americans and Mexico losing their territory. This was also the settlers moving from East to West, causing them to take over lands like Oregon, California, and Texas. The Louisiana Purchase and Homestead Act were some of the few policies that made this expansion possible.

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Americans were expanding to The Oregon Territory, California, and Texas.

Many Americans on the Oregon Trail veered off to TX where they enjoyed an abundance of self-govt.

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Louisiana Purchase (1803)

The U.S. bought 828,000 square miles from France for $15 million. It added land that would become 15 new states, including Louisiana, Arkansas, Missouri, Iowa, Kansas, Nebraska, and parts of Minnesota, North Dakota, South Dakota, Montana, Wyoming, and Colorado.

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After the cabinet members of Tyler resigned, he seek support from Democrats to be the new cabinet members. Tyler and the Democrats urged to expand west and supported the annexation of Texas, California, and the Oregon Territory, which resulted in war with Mexico

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Manifest Destiny was about a nation being destined for God and fate. It was mostly democrats who were trying to spread Christianity and democratic values. It was also an ideology and a justification for U.S. expansion. Mexico lost a lot of territory during this, as well as Native Americans being kicked out of their homelands.

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During this time, many Americans believed that it was God's will and Christian faith to expand the land toward the west.

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Manifest Destiny was the idea that the US could expand across the entire North American continent. Many people believe God wanted them to spread their faith through the land.

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Manifest Destiny was the 19th-century belief that the United States was destined to expand across the North American continent. Supporters argued that this expansion would spread American democracy, strengthen the economy, and fulfill a divine national mission. However, it also led to the displacement of Native peoples, the Mexican-American War, and increased tensions over slavery.

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During this era, the Americans believed that it was clearly God's will or Providence with the vast number of Christian population, spreading the benefits of its superior civilization by expanding westward.

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Americans believed God was blessing the USA because they saw their nation’s growth, democracy, and prosperity as proof of divine favor

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Manifest destiny is basically means that Americans believed it was God’s will for the U.S. to expand westward, spreading democracy and Christianity.

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Most Americans in the 1840s believed it was God's will to spread their "superior" faith, beliefs, and heritage westward. The belief in Manifest Destiny also justified the war with Mexico over territory out west (New Mexico, Texas, California).

They felt superior because they were WASPs