National colors of the 4th Ohio Volunteer Infantry. Text on flag reads: Mexican war 1846.

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The Mexican battle was a major conflict in between the joined States and Mexico indigenous 1846 come 1848.

During the 1820s and the 1830s, countless Americans relocated to Texas. In the early on 1830s, the Mexican government enacted a series of legislations designed to regulate the current American immigrant to Texas. In 1836, Texans climbed up against Mexico and secured their freedom. The Mexican federal government refused to acknowledge Texas" independence.

As shortly as castle had completed their independence, Texans lobbied the joined States federal government for admittance come the Union. Join was refused, primarily because many people thought the the admittance the Texas together a slave state would upset the balance between totally free and servant states. Because that the next nine years, Texas to be an elevation country. Texans still lobbied to join the joined States. In the presidential choice of 1844, James Knox Polk, the democratic Party"s candidate, won versus Henry Clay, the Whig Party"s candidate. Polk campaigned ~ above the problem of expansion, and also called because that the annexation of Texas. In 1845, President man Tyler formally authorized the annexation of Texas.

As quickly as Tyler linked Texas, Mexico damaged off diplomatic relations with the unified States. The two nations also became embroiled in a border dispute. The joined States declared that the Texas-Mexico border to be the Rio Grande. Mexico completed that the correct border to be the much more northerly Nueces River. Upon taking office, Polk instantly dispatched Zachary Taylor through 3,500 soldiers to the Nueces flow to safeguard the land claims of the joined States. At the very same time that Polk sent out the soldiers to the disputed area, he also dispatched john Slidell to Mexico to market thirty million dollars come the Mexican federal government for the brand-new Mexico Territory, California, and to develop the border of Texas in ~ the Rio Grande. The Mexican federal government refused to meet with Slidell.

In January 1846, president Polk ordered Taylor"s army to breakthrough to the Rio Grande. In April, mexico forces attacked Taylor"s army. Polk went prior to Congress and asked because that a statements of battle for Mexico"s unwarranted aggression. The congress agreed and also formally claimed war on may 13, 1846.

Polk notified Zachary Taylor to advance into northern Mexico. In September, Taylor"s army captured the city the Monterrey. Stephen Kearney and also a force of ripe hundred males secured new Mexico. His military then marched come California. With the help of man Fremont and a group of Americans already residing there, Kearney took control of California for the unified States. Regardless of these setbacks, the Mexican government refused to surrender. In 1847, Polk sent general Winfield Scott and also an military of twelve thousand guys to record Vera Cruz. Scott"s force then progressed upon Mexico City and also captured Mexico"s capital city in September 1847. The Mexican federal government now had no an option but to seek peace with the united States.

On February 2, 1848, Mexico and also the United claims signed the contract of Guadalupe Hidalgo. Mexico identified the Rio Grande as the border in between Mexico and also Texas. It additionally ceded brand-new Mexico and California come the unified States. In return, the United says paid Mexico fifteen million dollars and assumed roughly two million dollars in cases that American citizens had actually filed against the mexico government and businesses.

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In Ohio, like many Northern states, there was strong opposition to the mexico War. Many Northern Whig and also Liberty Party members thought that Polk just sought the territory acquired from Mexico to extend slavery. Most abolitionists protest the war and slavery on moral grounds. Various other Northerners go not desire to complete with southerly slaveholders in any territory acquired from Mexico. In 1846, David Wilmot, a autonomous member the the united States home of to represent from Pennsylvania, propose the Wilmot Proviso. The Wilmot clue would have actually prevented slavery"s growth into any kind of of the new territory acquired during the mexican War. The home of Representatives authorized the proviso on respectable 8, 1846, but the Senate adjourned before it could debate the bill. The House embraced the proviso again in its following session. Top top February 1, 1847, the Senate rubbish the proviso. As a result, the proviso never got in effect.

The clue passed the residence of Representatives due to the fact that a bulk of the representatives come from the North. Under the United states Constitution, every state obtained a variety of representatives based upon a state"s population. The phibìc had more people 보다 the South. In the Senate, there to be the same variety of slave and free states. Each state was entitled to 2 senators. When the Northern and Southern senators poll along local lines, a bill might not it is in approved. Northern and also Southern states intentionally tried to preserve the balance in between slave and complimentary states. As long as no side had an benefit in the Senate, a bill can not be sent out to the president to sign a regulation that can either end slavery or make it legitimate everywhere.

The Wilmot clue further split the North and the southern over the issue of slavery. Numerous Southerners believed that slavery have to be legal almost everywhere in the unified States. A growing number of Northerners, including numerous Ohioans, protest slavery"s expansion. The Wilmot proviso expressed the approach of the complimentary Soil Party and the later Republican Party that slavery have to not expand.

Approximately seven thousand Ohioans enlisted in the united States army during the mexico War. Most of these males served under Zachary Taylor in northern Mexico.