OHIO admitted to the Union,--Nov. 22.
1803. LOUISIANA ceded to the United States by France for 80,000,000 francs,--April 30. (By this cession the United States
claimed to the present western boundary of Florida.)
1804. The Philadelphia destroyed by Decatur at Tripoli,--Feb. 16.
DUEL between Hamilton and Burr, at Hoboken, N.J.,--July 11.
TWELFTH AMENDMENT to the Constitution declared in force,--Sept. 25.
ORLEANS TERRITORY formed,--Oct. I.
DISTRICT OF LOUISIANA formed, same as Louisiana cession, less Orleans Territory,--Oct. I.
1805. LOUISIANA TERRITORY formed,--March 3.
JEFFERSON'S second presidential term began,--March 4.
TREATY OF PEACE concluded with Tripoli,--June 4.