A steamboat patent was granted to the American engineer and inventor Robert Fulton.
The US published its first book on Geology – 'Observations on the Geology of the United States' by William Maclure.
The Clermont steamboat by Robert Fulton made its maiden trip up the Hudson River.
Lieutenant Zebulon Pike spotted an unnamed mountain peak while exploring the Colorado foothills of the Rocky Mountains.
Andrew Jackson killed Charles Dickinson in a duel.
The previously known District of Louisiana became the Louisiana Territory.
Secretary of the Treasury, Alexander Hamilton, was shot in a pistol duel with Vice President Aaron Burr.
Louisiana Purchase completed.
The United States ratified the Louisiana Purchase.
President Thomas Jefferson announced the Louisiana Purchase to the public.
The USA signed The Louisiana Purchase in Paris.
Ohio became the 17th state to join the United States of America.
The US Supreme Court ruled it would be the final interpreter of all constitutional issues.
Washington, D.C. was incorporated by Congress.
The first edition of America's oldest newspaper, The New York Evening Post, was published.
The US Senate held its first session in the unfinished Capitol Building.
US President John Adams became the first president to move into the White House.
Blacksmith, Patrick Lyon stole $162,821 in cash and gold from a vault at the Bank of Pennsylvania.
The Territory of Mississippi was formally organized.
America's second president John Adams was inaugurated in Philadelphia, Pennsylvania.
American abolitionist David Walker published his appeal to the African American publications in Boston.
President George Washington provided a letter of address to say he would not run for president again after 20 years of service.
David Humphreys handed out the first recorded US passport.
Tennessee became the 16th state to join the United States of America.
The United States received its first elephant.
The University of North Carolina opened, becoming the first US public state university.
The 11th Amendment to the United States Constitution was ratified.
British Navy Admiral William Brown and his crew discovered Honolulu Harbor.
Signing of the Jay Treaty.
The US Neutrality Act was enacted.
American inventor Eli Whitney was granted a patent for a ground-breaking new type of cotton gin.
Elizabeth Bennet became the first woman to give birth by a Cesarean section in the United States.
President George Washington marked the location for the Capitol Building in Washington, DC.
George Washington held the first Cabinet meeting in his house in Mount Vernon.
The return of escaped slaves in the US became compulsory after congress introduced the fugitive slave law.
Jean Pierre Blanchard flew the first hot air balloon in the US.
Henry Laurens became the first person to be cremated in the US.
George Washington was re-elected as the US President.
The cornerstone of the White House was laid, marking the first day of construction.
Organized by the Columbian Order, the first recorded 'Columbus Day' was celebrated on this day.
Kentucky became the 15th state to join the United States of America.
The Coinage Act was enacted in the US.
US President George Washington signed the Postal Service Act.
The US Bill of Rights was ratified when Virginia gave its approval, which became amendments 1-10 of the constitution.
African American almanac author Benjamin Banneker wrote a letter to Thomas Jefferson asking for justice for African Americans.
Vermont became the 14th state to join the United States of America.
American sea Captain Robert Gray returned to Boston after a three-year journey commanding the ship Columbia Rediviva.
Samuel Hopkins was awarded the first US patent.
The Copyright Act of 1790 became the first federal copyright act to be established in the United States.
Rhode Island became the thirteenth colony to enter the Union after the United States Constitution's ratification.
