50 Important Dates in US History. By nailahb06 Period: 539 BCE to 2020 Human Rights. This is used for human freedom. Jun 14, 1775 The United States Army is Established. This was originally used to protect the freedom of the 13 colonies. Nov 10, 1775 The United States Marine Corps is Established. The Marines were established to fight battles swiftly and aggressively. Jul 4, 1776 Declaration of Independence. The 13 colonies separating themselves from Great Britain. Nov 15, 1777 The Continental Congress approves the Articles of Confederation. This was to plan the structure of a new government. Feb 6, 1778 French Join the War Against the British or Treaty of Alliance. The French joined with the colonists because Britain was their main enemy. Sep 3, 1783 The Treaty of Paris 1783. This ended the Revolutionary War. Period: May 25, 1787 to Sep 17, 1787 The Delegates at the Philadelphia Convention approve the Constitution/Constitutional Convention. This was to decide how America would be governed. Apr 30, 1789 George Washington inaugurated as President of the United States. Washington was a Founding Father and a Military General for the Revolutionary War. Dec 15, 1791 The Bill of Rights is Ratified by Three-Fourths of the States. The Bill of Rights was ratified because it protected the rights of citizens. Apr 30, 1803 Lousiana Purchase. This helped the United States expand & have more land added. Mar 25, 1807 Slave Trade ended/ Abolition of the Slave Trade Act. Great Britain makes it illegal for Britain to purchase or buy any slaves because of the cruelty. Period: Jun 18, 1812 to Feb 18, 1815 War with England 1812/ War of 1812. The United States and the United Kingdom had tension & the tension increased over time so a war happened. May 23, 1831 Trail of Tears. Many Native Americans died because they were forced from their homes to walk in the cold. Period: Oct 22, 1835 to Apr 21, 1836 Texas Revoultion. A rebellion of colonists who went against the central government of Mexico. Period: Feb 23, 1836 to Mar 6, 1836 Battle of the Alamo. Texans fighting for independence against Mexico. May 24, 1844 Telegraph Invented. This was created to make communication easier. Period: Jan 24, 1848 to Jan 24, 1855 Gold Rush/California Gold Rush. Many people migrated to California. Period: Apr 12, 1861 to Apr 9, 1865 The Civil War. This started because of the differences between the free states and the slave states. Jan 1, 1863 Emanicipation Procolamation. This was to get rebellious states to rejoin the Union and also free slaves from the Confederate states. Apr 15, 1865 Assasination of Abraham Lincoln. This happened because John Wilkes Booth wanted to revive the Confederate side. Period: Dec 8, 1865 to Mar 31, 1877 Reconstruction/Reconstruction Era. The period after the Civil War where people made new things & made amends. Mar 1, 1875 Civil Rights Act of 1875. This put a ban on discrimination in public transportation and accommodations. Period: Apr 21, 1898 to Aug 13, 1898 Spanish-American War. This was because the United States wanted an empire. Dec 10, 1898 The United States Annexes Guam, Phillipines, and Puerto Rico/ Treaty of Paris 1898. This is because the United States wanted more land & power (imperialism). Period: Feb 4, 1902 to Aug 26, 1974 Charles Lindbergh. A famous American aviator. Period: Jul 28, 1914 to Nov 11, 1918 World War l. This happened because of the assassination of Archduke Franz Ferdinand of Austria-Hungary. Aug 15, 1914 The Panama Canal opens for Business. This was used for faster ways of travel for shippers of commercial goods. Jan 28, 1919 The Treaty of Versailles is signed/Treaty of Versailles. This was used to end World War 1. Jun 4, 1919 19th Amendment. Prohibits denial of right to vote because of sex/gender. Nov 2, 1920 First Radio Broadcast in Pittsburgh, Pennslyvania/KDKA. This was used for commercial use. Oct 29, 1929 Black Tuesday. A major collapse in the stock market. Period: Sep 1, 1939 to Sep 2, 1945 World War ll. This is because of the takeover of Hitler & Germany being against the Treaty of Versailles. Dec 7, 1941 Pearl Harbor. The Japanese wanted natural resources. Jun 4, 1944 D-Day. The Allied Forces fight against Germany and save the Holocaust survivors. Period: Aug 6, 1945 to Aug 9, 1945 First Atomic Bomb Dropped on Japan. This was used to make Japan surrender. Period: 1946 to 1961 Baby Boom. This happened because many babies were born and husbands came back from the war. Period: 1947 to 1991 The Cold War. The tension between the Soviet Union and the United States. Period: Jun 25, 1950 to Jul 27, 1953 Korean War. A war between North & South Korea (proxy war, because the North was the Soviet Union & the South, was the United States). Period: Dec 9, 1952 to May 17, 1954 Brown v. Board of Education. Ruling that racial discrimination in public schools is unconstitutional. Period: Nov 1, 1955 to Apr 30, 1975 Vietnam War. This happened because the United States wanted to stop the spread of communism. Oct 4, 1957 Sputnik Satellite. The Soviet Union sent this satellite into space as a race between the United States. Jul 29, 1958 NASA formed. This is used to develop space technology & discover more about space. May 6, 1960 Civil RIghts Act of 1960. This helped African Americans get to vote. Nov 22, 1963 Assasination of John F. Kennedy. Lee Harvey Oswald killed John F. Kennedy while Kennedy was on a trip in Texas with his wife Jacqueline. Period: Jul 16, 1969 to Jul 21, 1969 Apollo 11. This was the first spaceflight that landed humans on the moon. Jun 17, 1972 Watergate Scandal. Illegal activities that Richard Nixon's administration members. Period: Aug 2, 1990 to Feb 28, 1991 Gulf War. This started because Saddam Hussein ordered the invasion and occupation of neighboring Kuwait. 1991 Fall of the Berlin Wall. This wall was used as an iron curtain of the Cold War. Sep 11, 2001 September 11th. Osama Bin Laden's declaration of a holy war against the United States.