To what extent did the acquisition help and hurt the United States?

The aquisition boasted up the economic and sense of national identity, but it also arose the controversial issue of slavery in the new territories along with many other political differences that needed to be resolve.

After Thomas Jefferson’s Louisiana Purchase in 1803 which
had doubled the United States’ size, Americans explored this huge territory in limited numbers. Then the fever of expansion swept through country, Americans seized a new sense of identity which believed that their movement westward and southward was destined and ordained . Despite the tough and crude frontier life, the new land attracted enormous number of the emigration. Urban growth continued explosively, which would become the working force contribute greatly to the expansion of industrialization. Although great part of expansion was saw as the economic's prosperity, it also led to political difference on the concern of slavery. The national unity particularly fluctuated during the annexation of Texas. In 1837, as the taxan officially petitioning for a outright union with United States, the American Anti-slavery began to work towards preventing annexation at any cost. If the Texan was admitted into the Union the new slave state would wreck the hard won balance of slave and free states in the Missouri Compromise. Thus giving south an advantage over the north. The abolitionist came to contended that the whole scheme was merely a conspiracy cooked up by the southern "slaceocracy" to bring new slave pens into the union. As the annexation of taxan inescapably meant enlarging American slavery, Such a expansion would be another stronger push of disunification.