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In July 1787 through the Northwest Ordinance of 1787 under the Congress of the Confederation, slavery was prohibited in the territories northwest of the Ohio River.
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On July 16, 1790, the creation of a federal district to become the national capital was approved by the United States Congress.
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Whitney had invented the cotton gin, a machine that automated the separation of cottonseed from cotton fiber, in April of 1793.
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The Jay Treaty was ratified Feb. 29 1796 and it resolved remaining issues from the Treaty of Paris of 1783.
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The Louisiana Purchase was signed on April 30, 1803 it authorized President Jefferson to take possession of the territory and establish a temporary military government.
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Tobias Lear negotiated a second "Treaty of Peace and Amity" with the Pasha Yusuf on June 4, 1805 to release the prisoners from the USS Philadelphia and several U.S. merchant ships and to stop taking U.S. ships and seamen hostage.
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August 7 1807 Robert Fulton invents the first commercially successful steamboat.
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The construction of the National Road began at Cumberland, Maryland in 1811, it was finished being built out to Wheeling, Virgin in 1818.
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Tecumseh lost against the U.S. troops at the battle of Thames, October 5 1813, where he was killed.
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Construction of the 363 mile long Erie Canal began July 4, 1817 at Rome, New York and was completed in October 26, 1825.
