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The Florida Cession is land that was separated by the Adams onis Treaty. This treaty was signed in 1819 by John Quincy Adams. The treaty(s) purpose was to separate American and Spain land.

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The Territory of Oregon was an organized incorporated territory of the United States that existed from August 14, 1848, until February 14, 1859, when the southwestern portion of the territory was admitted to the Union as the State of Oregon.

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The Transcontinental Railroad (known originally as the "Pacific Railroad" ) continuous railroad line constructed between 1863 and 1869 that connected the existing eastern U.S. rail network with the Pacific coast.

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The Sand Creek massacre (also known as the Chivington massacre, the Battle of Sand Creek or the massacre of Cheyenne Indians) was a massacre in the American Indian Wars that occurred on November 29, 1864, when a 675-man force of Colorado U.S. Volunteer Cavalry attacked and destroyed a village of Cheyenne and Arapaho in southeastern Colorado Territory, killing and mutilating an estimated 70–163 Native Americans, about two-thirds of whom were women and children.

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The Homestead Acts were several United States federal laws that gave an applicant ownership of land, typically called a "homestead", at no cost. In all, more than 270 million acres of public land, or nearly 10% of the total area of the U.S., was given away free to 1.6 million homesteaders; most of the homesteads were west of the Mississippi River.

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The Battle of the Alamo (February 23 – March 6, 1836) was a pivotal event in the Texas Revolution. This battle took place at a old Spanish mission called the "Alamo". This battle lasted 12 days. No one survived the Alamo besides Spain.

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The Oregon Trail is a trail used for transportation to move west. This trail connects with Independence, Missouri to Oregon City, Oregon. Many have used this route to get to the west.

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The Indian Removal Act was passed by Congress on May 28, 1830, during the presidency of Andrew Jackson. Indians were forced out of their homes and had to walk all the way to the  west on what's now known as " The Trail of Tears". Many tribes were apart of this such as Cherokee, Chickasaw, Choctaw and Creek. The reason why they did this was because to make more room in the east.

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The French and Indian War (1754–63),The war pitted the colonies of British America against those of New France, with both sides supported by military units from their parent countries of Great Britain and France, as well as by American Indian allies. The war was mainly over a piece of land that was the Ohio River Valley. It was a win from British America

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Manifest Destiny is a nineteenth-century belief that the United States had a mission to expand westward across the North American continent. Americans at this time thought that they were the best, so they thought they deserved the whole North America at this point! This was a very popular belief around America.

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The Monroe Doctrine was a United States policy of opposing European colonialism in The Americas beginning in 1823. This document opposed communication with the eastern hemisphere

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The Pony Express was a mail service delivering messages, newspapers, and mail. This was the popular way to send mail before telegraphing was invented.

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The gold rush began January 24, 1848, when gold was found by James W.Marshall at Stutter's Mill in Coloma, California. The effects of the Gold Rush were substantial. Whole indigenous societies were attacked and pushed off their lands by the gold-seekers, called "forty-niners" (referring to 1849).

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Thomas Jefferson made this purchase from France. The Louisiana territory included land from fifteen present U.S. states and two Canadian provinces.

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The Lewis and Clark Expedition from May 1804 to September 1806, also known as the Corps of Discovery Expedition. Meriwether Lewis and his close friend William Clark were sent orders to find a route to the Pacific Ocean. While on the journey, they have crossed paths with  woman named " Sacagawea ". She helped with finding routes for the trip and helped where to go.

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The Mexican–American War was about Mexico/Spain trying to say it was their claimed land in America. Despite the fact of the whole Texas Revolution, America owns the land but Spain refuses to think that. Every time a American walks onto that soil, Spain would kill them, Resulting in war.

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The War of 1812 was a military conflict that lasted from June 1812 to February 1815, fought between the United States of America and the United Kingdom. The War of 1812 happened mainly because of Britain attacking American ships when going to trade. Mostly because Britain soldiers were on American boats so they stole them back but they also took American soldiers with them on accident! This event kind of helped with opening new land in the west.

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The U.S.A. received land from Britain. The official date of the document was September 3, 1783 it ended the American Revolutionary war. The treaty set the boundaries between the British Empire and the United States, on lines "exceedingly generous" to the latter.

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This declaration set America free from Britain officially. The official date of this day is July 4, 1776. This document made it official for the 13 colonies to become the official 13 United States of America.

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The Klondike Gold Rush was a migration by an estimated 100,000 prospectors to the Klondike region of the Yukon in north-western Canada between 1896 and 1898