Unit 5 Terms

Gold Rush

A mass migration of prospectors and settlers to California in 1848, triggered by the discovery of gold at Sutter’s Mill. Its significance lies in the rapid population growth of California, the economic boom it created, and its role in shaping the cultural and social landscape of the American West.

John Tyler

The 10th president of the United States (1841-1845), known for advocating the annexation of Texas and for conflicts with Congress. His significance lies in his role in the early expansion of the United States and the contentious political environment of his presidency.

Fifty-Four Forty or Fight!

A slogan used by American expansionists in the 1840s demanding U.S. claim to the Oregon Territory up to the 54° 40’ parallel. Its significance lies in its embodiment of the spirit of Manifest Destiny and the desire for territorial expansion, reflecting the belief that the U.S. was destined to expand across the continent.

James K. Polk

The 11th president of the United States (1845-1849), known for his belief in Manifest Destiny and significant territorial expansion. His significance lies in his aggressive pursuit of territorial acquisitions including the Oregon Territory and the lands obtained through the Mexican-American War, fundamentally shaping the future boundaries of the United States.

Webster-Ashburton Treaty

An 1842 treaty resolving boundary disputes between the U.S. and Great Britain, improving diplomatic relations. Its significance lies in the peaceful resolution of territorial disagreements, helping to prevent conflict and fostering a period of improved relations between the two nations.

Zachary Taylor

The 12th president of the United States (1849-1850) and a war hero from the Mexican-American War, whose term was cut short by death. His significance lies in his role during a tumultuous time regarding slavery and territory expansion, and his unexpected death raised questions about the future of the Union.

Bear Flag Republic

An independent republic established by American settlers in California in 1846 during the Mexican-American War. Its significance lies in its role as a precursor to California's eventual statehood and as a manifestation of American expansionist sentiment during the period.

Treaty of Guadalupe Hidalgo

The 1848 treaty that ended the Mexican-American War, with Mexico ceding vast territories to the U.S. Its significance lies in the substantial territorial gains for the United States, including present-day California, Arizona, New Mexico, Nevada, Utah, and parts of Colorado and Wyoming, which fundamentally shifted the boundaries of the nation and intensified debates over slavery and expansion.

Wilmot Proviso

A failed proposal in 1846 to ban slavery in territories acquired from Mexico, heightening sectional tensions. Its significance lies in how it underscored the deepening divide between the North and South over the issue of slavery, contributing to the growing conflicts that would eventually lead to the

Gadsden Purchase

An 1853 agreement in which the U.S. bought land from Mexico to facilitate a southern transcontinental railroad. Its significance lies in its role in the development of key transportation routes across the southern United States, furthering the economic integration of the region and underscoring the U.S. commitment to westward expansion.

Free-Soil Party

A political party founded in 1848 opposing the expansion of slavery into western territories. Its significance lies in its role in shaping political discourse around slavery, helping to organize anti-slavery sentiments and ultimately contributing to the formation of the Republican Party

Popular Sovereignty

authority of a government is created and sustained by the consent of its people (allow slavery). Its significance lies in how it reflected the idea of democracy and self-determination, while also intensifying the conflict between pro-slavery and anti-slavery factions in the lead-up to

Compromise of 1850

A series of laws intended to resolve sectional conflict, including the admission of California as a free state. Its significance lies in its attempt to balance the interests of free and slave states, delaying the onset of the Civil War and illustrating the growing tensions between North and South regarding slavery and territorial expansion.