On This Day

The Louisiana Purchase is announced to the American people by President Thomas Jefferson

The Louisiana Purchase (French: Vente de la Louisiane, lit. 'Sale of Louisiana') was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803.

The Louisiana Purchase (French: Vente de la Louisiane, lit. 'Sale of Louisiana') was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River's drainage basin west of the river. In return for fifteen million dollars, or approximately eighteen dollars per square mile ($7/km2), the United States nominally acquired a total of 828,000 sq mi (2,140,000 km2; 530,000,000 acres) of land now in the Central United States.

Historical Significance

The Louisiana Purchase (French: Vente de la Louisiane, lit.

Key People

Thomas Jefferson

Founding Father & President

Primary author of the Declaration of Independence; 3rd US President

Events Before

  1. Congress passes an act calling for a US Capitol library

    Congress passes an act calling for a US Capitol library

  2. 1st leopard exhibited in US, Boston (admission 25 cents)

    1st leopard exhibited in US, Boston (admission 25 cents)

  3. Simon Willard patents banjo clock

    Simon Willard (April 3, 1753 – August 30, 1848) was a celebrated American clockmaker. Simon Willard clocks were produced in Massachusetts in the towns of Grafton and Roxbury, near Boston.

  4. 1st US Military Academy at West Point is established through Congressional act (opened July 4, 1802)

    The United States Military Academy (USMA), commonly known as West Point, is a United States service academy in West Point, New York, that educates cadets for service as commissioned officers in the...

  5. Great Britain and the French Republic sign the Treaty of Amiens

    The Treaty of Amiens (French: la paix d'Amiens, lit. 'the peace of Amiens') temporarily ended hostilities between France, the Spanish Empire, and the United Kingdom at the end of the War of the...

Events After

  1. Jean-Jacques Dessalines declares Saint-Domingue (Haiti) independent from France, ending the 13-year-long Haitian Revolut

    Jean-Jacques Dessalines declares Saint-Domingue (Haiti) independent from France, ending the 13-year-long Haitian Revolution; becoming the only state ever founded by formerly enslaved people and without slavery

  2. World’s first steam locomotive, built by Richard Trevithick, runs for the first time along the tramway of the Penydarren

    World’s first steam locomotive, built by Richard Trevithick, runs for the first time along the tramway of the Penydarren Ironworks in Merthyr Tydfil, Wales

  3. Economist Thomas Malthus (38) weds Harriet Eckersall in Bath, Somerset

    Economist Thomas Malthus (38) weds Harriet Eckersall in Bath, Somerset

  4. Napoleonic Code is adopted in France, stressing clearly written and accessible law

    The Napoleonic Code (French: Code Napoléon), officially the Civil Code of the French (French: Code civil des Français; simply referred to as Code civil), is the French civil code established during…

  5. Meriwether Lewis and William Clark's expedition sets out from St. Louis for the Pacific Coast, commissioned by Thomas Je

    Meriwether Lewis and William Clark's expedition sets out from St. Louis for the Pacific Coast, commissioned by Thomas Jefferson

More from the 1800s

Frequently Asked Questions

What happened on July 4, 1803?
The Louisiana Purchase (French: Vente de la Louisiane, lit. 'Sale of Louisiana') was the acquisition of the territory of Louisiana by the United States from the French First Republic in 1803. This consisted of most of the land in the Mississippi River's drainage basin west of the river.
Why is The Louisiana Purchase is announced to the American people by President Thoma... significant?
The Louisiana Purchase (French: Vente de la Louisiane, lit.
Who was involved in The Louisiana Purchase is announced to the American people by President Thoma...?
Key figures include Thomas Jefferson (Founding Father & President).

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