Territorial Expansion 1800-1850

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From the years 1800-1850 the nation was full of battles and prosperity. Territorial expansion was a cause in most of the battles, but also gained prosperity for the nation. There were many impacts on national unity between those time periods, but the main impact was territorial expansion. This is true because of the Louisiana Purchase, the purchase of Oregon territory, and the Mexican War.

The Louisiana Purchase was the most important event of President Thomas Jefferson's first Administration. In this transaction, the United States bought 827,987 square miles of land from France for about $15 million. This vast area lay between the Mississippi River and the Rocky Mountains, stretching from the Gulf of Mexico to the Canadian Border. The purchase of this land greatly increased the economic resources of the United States, and cemented the union of the Middle West and the East. Eventually all or parts of 15 states were formed out of the region. When Jefferson became president in March 1801, the Mississippi River formed the western boundary of the United States. The Florida's lay the south, and the Louisiana Territory to the west. Spain owned both these territories.

Farmers who lived west of the Appalachian Mountains shipped all their surplus produce by boat down rivers that flowed into the Gulf of Mexico. In a treaty of 1795, Spain agreed to give Americans the "right of deposit" at New Orleans. This right allowed Americans to store in New Orleans, duty-free, goods shipped for export. Arks and flatboats transported a great variety of products, including flour, tobacco, pork bacon, lard, feathers, cider, butter, cheese, hemp, p...

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...rson (Oxford 2003)

This book helped me with finding information about the Louisiana Purchase. It also helped me with all people and things involved in the Louisiana Purchase.


This website also helped me with the Louisiana Purchase. It also gave me some information on the Oregon Territory.


This website helped me find information about the Mexican War. It gave me all the background information of the war and the aftermath of it.

Macarthur, The History of the United States

This textbook helped with research on the Louisiana Purchase, the Mexican War, and on the Oregon Territory. It helped me with all of the facts of those three topics.

A.P. History Proficiency

What was the impact of territorial expansion on national unity between 1800 and 1850?

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