12/29 【历史上的今天】这个国家主动放弃了自己的主权

美国历史上的今天

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每天一篇《美国历史上的今天》，提炼和总结历史在今天发生的重要事件：谁，在哪里，什么时候，做了什么，这件事为什么重要、以及在写关于什么主题的论文的时候可以作为潜在论据引用。

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When: December 29, 1845

What: Texas was admitted into the United States as the 28th state

Why significant: Texas entered the United States as a slave state. This broadened the irrepressible differences over the issue of slavery, and set off the Mexican-American War (1846 to 1848). The war, however, did not resolve the issue of slavery in the U.S., but rather in many ways inflamed it, as potential westward expansion of the institution took an increasingly central and heated theme in national debates. The bitter debates over slavery finally culminated in the American Civil War (1861–1865).

The Mexican-American War was one of the most decisive events for the U.S. in the first half of the 19th century. For the outside, it marked a significant waypoint for the nation as a growing military power. Within the U.S., it served as a milestone for the narrative of Manifest Destiny, as the victory and acquisition of new land fulfilled Democrats' belief in their country's Manifest Destiny.

In doing much to extend the nation from coast to coast, the Mexican–American War was also one step in the huge migrations to the West of Americans, which resulted in transcontinental railroads and the Indian wars later in the same century.

Tags: Mexican-American War, American expansionism, President Polk, Manifest Destiny