Because it was getting harder to create new slave-states, so the South was increasingly outvoted in Congress.
There was not one specific date, Westward Expansion happened over a long period of time.
One is the fur trappers
Slavery played a significant role in westward expansion in the United States. The expansion of slavery into new territories and states fueled sectional tensions between the North and South, eventually leading to the American Civil War. The issue of whether new states would allow or prohibit slavery was a major factor in determining the balance of power between the free and slave states, and ultimately the course of westward expansion.
Westward expansion refers to the 19th-century movement of settlers into the American West, driven by the belief in Manifest Destiny—the idea that Americans were destined to expand across the continent. This period saw the acquisition of vast territories through treaties, purchases, and conflicts, including the Louisiana Purchase and the Mexican-American War. The expansion significantly impacted Indigenous populations, leading to displacement and cultural changes. It also contributed to economic growth and the development of new states, but it intensified debates over slavery and contributed to regional tensions leading up to the Civil War.
The Westward Expansion offered several pros, including the opportunity for land ownership, economic prospects, and the chance to start anew in a less populated area. It facilitated the growth of infrastructure and communities, contributing to the nation's development. However, the cons included displacement and suffering of Indigenous populations, environmental challenges, and the harsh realities of life in uncharted territories, such as disease and scarcity of resources. Additionally, it exacerbated tensions over slavery, ultimately contributing to the Civil War.
There was not one specific date, Westward Expansion happened over a long period of time.
Because new opportunities and technological advances led to westward migration
One is the fur trappers
Westward expansion led to an economic "boom" in the Midwest, as new cities and markets were connected by rail and canals.
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Slavery was a problem that continued to plague the settlers even during the height of the westward expansion and would later be the focus of the Civil War.
After the Civil War, the US military built the frontier because of the American westward expansion.
Look in the westward expansion after the civil war mini textbook.
Westward expansion created territories that eventually wished to become States. Every application for Statehood prior to the Civil War increased sectional tension because of the need to balance "free" and "slave" States in Congress.
The War of 1812 secured existing US boundaries and defeated tribes in the Ohio and Mississippi valleys. This along with the Indian Removal Act of 1830, opened the door to significant westward expansion by people across America .
The westward expansion in the United States began with the purchase of the Louisiana territory in 1803. The expansion to the west continued until the start of the Civil War in 1861. This period was known as Manifest Destiny.
Fierce debate over which of the new states could be slave-states and which could be free soil.