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The Battle of Monongahela took place on July 9, 1755. The British were determined to drive the French out of western Pennsylvania and sent a standing army of 2,000 and a colonial militia under the command of General Edward Braddock to conquer the confluence of the Allegheny and Monongahela rivers Duquesne
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The map marks the original Mason-Dickson line, which is traditionally considered to be the watershed between the north and south of the United States, and the boundary between slave states and non-slavery states before the Civil War. -
With the introduction of the Townsend Act of 1767, Britain imposed taxes on imported goods, which intensified tensions between local people and official representatives. On March 5, 1770, a group of Bostonians surrounded the British sentries guarding the Boston Customs House and threw snowballs at them. Despite clear orders, on the contrary, they shot at the crowded people, killing three people, wounding eight people, and two of them. -
On July 4, 1776, John Dunlap, the official printer of the Continental Congress, produced the first printed version of the American Declaration of Independence in his shop in Philadelphia. -
This treaty submitted to Congress by American negotiators John Adams, Benjamin Franklin, and John Jay officially ended the American War of Independence. This is one of the most favorable treaties the United States has ever negotiated. Two of the key provisions stipulate that Britain recognizes American independence and delimits the border, which allows the United States to expand westward to the Mississippi River. -
Thomas Jefferson was the third president of the United States and one of the founding fathers of the United States. -
This map was painted by John Melish in 1816 and was the first map to draw the United States as a continental country extending from the Atlantic to the Pacific. -
Abraham Lincoln was the 16th President of the United States. The principle was to oppose the expansion of slavery to the western United States. This view prompted the Southern states to separate from the Union. Lincoln refused to accept the division. He launched a war against the South to preserve the Union and eventually abolish slavery in the United States. -
The decree declared Florida to be a "sovereign independent country." On April 13, the meeting approved the constitution adopted by the Confederate States of America. The meeting was adjourned on April 27, 1861. -
This printed map from the Office of the Chief Engineer of the U.S. Department of the Army details the operational deployment for the Battle of Bull Creek on July 21, 1861. -
The then President of the United States Abraham Lincoln issued the "Preliminary Proclamation for the Emancipation of Black Slaves," in which he stated that as of January 1, 1863, the states still in rebellion and slaves in the rebellious areas within the states will be free. 100 days later, Lincoln issued the "Proclamation on the Emancipation of Black Slaves," announcing that "all people who are slaves in the rebellious area will be free from now on." -
Approximately 4 million slaves were freed at the end of the American Civil War. Stories about thousands of people are passed on to future generations through word of mouth, diaries, letters, records or interview transcripts.
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In the test notes dated March 10, 1876, Alexander Graham Bell described the first successful test of the telephone. In the test, he used the device to challenge the assistant Thomas A. Watson in the next room.