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Christopher Columbus discovered America and millions of Europeans began immigrating to U.S.
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Appalachian Mountains formed a natural boundary for the formation of the 13 U.S. colonies.
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Colonies rebelled against England, and began the Revolution which ended in 1783, with American Independence.
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Land purchased from France which included everything west of Mississippi River to the Rocky Mountains.
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States began choosing sides over critical issues such as slavery, and claimed loyalty to their state before their nation.
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Northern States fought the Southern states to keep the nation united. The south pulled out of the union, in order to keep slavery. North won the war which ended in 1865, and slavery was abolished.
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People began moving west to settle the frontier.
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People began moving from farms into cities to work in factories & industry.
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1st World War in Europe between the Allied and Central powers, which occured between 1917-1919. The United States entered the war in 1918 when Germans sank U.S. ships.
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The Depression occured because of many factors, such as involement in WWI & the stock market crash of the late 1920's. This Depression lasted about 10 years until the outbreak of WWII.
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The 2nd war in Europe, (1939-1945) that involved the Allied and Axis powers. The United States entered this war on December 7, 1941. after Japan bombed Pearl Harbor in Hawaii. The Allied powers won this war.
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Americans liked the quiet lifestyle of the suburbs, which are areas outside of city limits, and began moving out of hectic city-life to follow the American Dream.
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The Civil Rights Movement began in the 1960's and lasted until the 1970's. The movement gained equal rights for blacks and other minorities, as well as involved protests of U.S. armies fighting in the Vietnam War.
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From the 1980's until present day, the U.S. has seen an increased dependence on technological advances.