page_title: American frontier
section_title: Manifest Destiny
hierarchical_section_title: American frontier / The Antebellum West / Manifest Destiny
caption_attribution_description: Map of the states and territories of the United States as it was from 1834 to March 1836. On June 30 1834, Michigan Territory was expanded into previously unorganized land. On March 2 1836, the Republic of Texas achieved independence from Mexico, though large portions remained disputed.
context_page_description: The American frontier includes the geography, history, folklore, and cultural expression of life in the forward wave of American expansion that began with English colonial settlements in the early 17th century and ended with the admission of the last remaining western territories as states in 1912. This era of massive migration and settlement was particularly encouraged by President Thomas Jefferson following the Louisiana Purchase, giving rise to the expansionist philosophy known as "Manifest Destiny" and the frontierist "Frontier Thesis".
  A frontier is a zone of contact at the edge of a line of settlement. Leading theorist Frederick Jackson Turner went deeper, arguing that the frontier was the defining process of American civilization: "The frontier," he asserted, "promoted the formation of a composite nationality for the American people." He theorized it was a process of development: "This perennial rebirth, this fluidity of American life, this expansion westward...furnish[es] the forces dominating American character."
context_section_description: Manifest Destiny was the belief that the United States was preordained to expand from the Atlantic coast to the Pacific coast. The concept was expressed during Colonial times, but the term was coined in the 1840s by a popular magazine which editorialized, "the fulfillment of our manifest destiny...to overspread the continent allotted by Providence for the free development of our yearly multiplying millions." As the nation grew, "Manifest Destiny" became a rallying cry for expansionists in the Democratic Party. In the 1840s the Tyler and Polk administrations (1841–49) successfully promoted this nationalistic doctrine. However, the Whig Party, which represented business and financial interests, stood opposed to Manifest Destiny. Whig leaders such as Henry Clay and Abraham Lincoln called for deepening the society through modernization and urbanization instead of simple horizontal- expansion. Starting with the annexation of Texas, the expansionists got the upper hand. John Quincy Adams, an anti-slavery Whig, felt the Texas annexation in 1845 to be "the heaviest calamity that ever befell me and my country".
  Helping settlers move westward were the emigrant "guide books" of the 1840s featuring route information supplied by the fur traders and the Frémont expeditions, and promising fertile farm land beyond the Rockies.
caption: United States territories in 1834–36
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