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WestwardExpansion

Pragya Kancherla

Created on November 6, 2025

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Transcript

Oregon Territory

The Oregon Trail

13 Colonies

Califoria Trail

Louisiana Purchase

Mormon Trail

Land Acquired After Revolution
Mexican Cession

Santa Fe Trail

Gadsden Purchase
Texas Annexation
Florida Cession

The Texas Revolution (1835-36) was a military conflict between Mexico and Texas, which resulted in Texas gaining independence. It resulted primarily due to conflict arising from the growing population of American settlers in Texas, who used to a different governing system, clashed with Mexico's government.

1846

The Mexican-American War, resulting from the United States' desire for expansion and conflict over the annexation of Texas, began when Polk intentionally provoked the war by sending US troops into disputed territory in 1846, and ended with the Treaty of Guadalupe Hidalgo in 1848.

The Mexican-American War, resulting from the United States' desire for expansion and conflict over the annexation of Texas, began when Polk intentionally provoked the war by sending US troops into disputed territory in 1846, and ended with the Treaty of Guadalupe Hidalgo in 1848.

The Trail of Tears

1830s and 1840s

The Indian Removal Act, passed in 1830, led tothe forced removal of Native American tribes from Southeastern United States to reservations, primarily the one in Oklahoma. In this journey, known as the Trail of Tears, many were pushed from their homeland and the journey was characterized by harship, disease, and death.

Excerpt from the Indian Removal Act. Click the link for the full document

Gadsden Purchase

1853

The Gadsden Purchase, signed December 3rd, 1853, gave the United States parts of New Mexico and Arizona, about 55,000 square miles, in return for $10 million. The treaty aimed to solve disputes between Mexico and the United States following the Mexican American War and provide the land needed to complete the Southern Transcontinental Railroad.

U.S. postage stamp commemmorating the Gadsden Purchase

Oregon Territory

1846

By this time, many Americans had already migrated to the Oregon Territory through the Oregon Trail. In order to prevent border dispute, and already having many in Congress pushing towards extending the US border to the 54° 40' line of latitutde, Polk proposed a compromise, and the The Treaty of Oregon (signed June 15, 1846) established the US-British North America border at the 49th parallel.

Painting of the Oregon Trail, the migratory pathway many used to get to the Oregon Territory

Learn more?

California Gold Rush

Ithe California Gold Rush was a rapid movement of people to California, hoping to seek gold. It began in 1848 when flakes of gold were found in a streambed in Sutter's Mill. By 1849, over 80,000 "forty-niners" were at the goldfields, and by 1852, there were about 250,000.

More information?

Texas Annexation

1845

After the Mexican-American War, Texas desired to be annexed by the United States for both economic benefit and military protection. After prior attempts, a new annexation offer was made by the United States, and sent to the Texas president, Anson Jones. Despite a treaty with Mexico also having been offered, which guaranteed Texas its independence as long as it remained a separate republic, Texas accepted the US offer. Once formally approved and signed, Texas became the 28th state.

After annexing Texas and before the Mexican-American War, much of its territory was disputed. The image above shows this disputed territory.

Full timeline of the annexation process

The 13 Colonies

1607-1732

Many immigrated to the United States from Europe due to religious and economic regions. Over the period 1607 to 1732, each of the 13 colonies were established, with jamestown being established 1607 and gerogia in 1732. After the Treaty of Paris in 1783, this land officially became part of America.

The "Join, or Die" policical cartoon is one of the most well known depictions that represent the colonies. It was originally made in the context of the French and Indian War, but was used again in the Revolutionary War.

Date of Establishment of Each Colony

California Gold Rush

Ithe California Gold Rush was a rapid movement of people to California, hoping to seek gold. It began in 1848 when flakes of gold were found in a streambed in Sutter's Mill. By 1849, over 80,000 "forty-niners" were at the goldfields, and by 1852, there were about 250,000.

More information?

Land gained after Revolution

1783

This land was originally gained by Britain as a result of the 1763 Treaty of Paris, which ended the French and Indian War. However, the same year, the Proclamation of 1763 prevented settling into the newly gained land. After the American Revolution, the 1783 Treaty of Paris transferred this land from Britain to the United States.

The Proclamation Line of 1763

Florida Cession

1821

Before this time, many Americans had already begun to move to West Florida, and after the American settlers rebelled in 1810, the United States used the incident to gain claim to the region, claiming that a portion of West Florida was a part of the 1803 Louisiana Purchase. After Jackson's military action against Florida alongside increasing concern over Spanish control over Florida's inhabitants, an agreement was made through the Adams-Onis Treaty, in where the Spanish colonies of East and West Florida were transferred to the United States.

Political cartoon of the Florida Cession

Learn how this affected claims over Texas?

The Trail of Tears

1830s and 1840s

The Indian Removal Act, passed in 1830, led tothe forced removal of Native American tribes from Southeastern United States to reservations, primarily the one in Oklahoma. In this journey, known as the Trail of Tears, many were pushed from their homeland and the journey was characterized by harship, disease, and death.

Excerpt from the Indian Removal Act. Click the link for the full document

Mexican Cession

1848

This land was acquired through the Treaty of Guadalupe Hidalgo, which officially ended the Mexican American War (1846-1848) and was signed Feb 2, 1848. In the treaty, Mexico ceded 55% of it's territory, which was more than 525,000 square miles of land. The treaty was ratified March 10, 1848.

"A little more grape Capt. Bragg" is a depiction of General Taylor at the Battle of Buena Vista in the Mexican American War, which later resulted in the Mexican Cession.

Link to Source

Louisiana Purchase

1803

The Louisiana Purchase occured as a consequence of the original proposal to purchase New Orleans from France, which aimed to secure access of the Mississippi River. Napoleon Bonaparte, needing to finance his European Wars and deal with the slave revolt in Haiti, offered to sell the entire Louisiana Territory for $15 milion dollars, a great deal at the time.

Image of the route taken in the Lewis and Clark expedition, which explored much of the Louisiana Purchase and the Oregon Territory.

Link to Source