Important Historical Events of the year 1803, Year 1803 in History

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List of 1803 Major News Events in History, Most Important Historical Events in 1803

What happened in the year 1803?

Date	Event
February 24, 1803	In Marbury v. Madison, the Supreme Court of the United States establishes the principle of judicial review.
April 26, 1803	Thousands of meteor fragments fall from the skies of L'Aigle, France; the event convinces European scientists that meteors exist.
April 30, 1803	Louisiana Purchase: The United States purchases the Louisiana Territory from France for $15 million, more than doubling the size of the young nation.
May 18, 1803	Napoleonic Wars: The United Kingdom revokes the Treaty of Amiens and declares war on France.
June 18, 1803	Haitian Revolution: The Royal Navy led by Rear-Admiral John Thomas Duckworth commence the blockade of Saint-Domingue against French forces.
July 4, 1803	The Louisiana Purchase is announced to the American people.
July 5, 1803	The Convention of Artlenburg is signed, leading to the French occupation of the Electorate of Hanover (which had been ruled by the British king).
July 26, 1803	The Surrey Iron Railway, arguably the world's first public railway, opens in south London, United Kingdom.
September 6, 1803	British scientist John Dalton begins using symbols to represent the atoms of different elements.
September 11, 1803	Battle of Delhi, during the Second Anglo-Maratha War, between British troops under General Lake, and Marathas of Scindia's army under General Louis Bourquin.
September 23, 1803	Second Anglo-Maratha War: The Battle of Assaye is fought between the British East India Company and the Maratha Empire in India.
October 20, 1803	The United States Senate ratifies the Louisiana Purchase.
November 18, 1803	The Battle of Vertières, the last major battle of the Haitian Revolution, is fought, leading to the establishment of the Republic of Haiti, the first black republic in the Western Hemisphere.
November 30, 1803	The Balmis Expedition starts in Spain with the aim of vaccinating millions against smallpox in Spanish America and Philippines.
November 30, 1803	In New Orleans, Spanish representatives officially transfer the Louisiana Territory to the French First Republic.
December 6, 1803	Five French warships attempting to escape the Royal Naval blockade of Saint-Domingue are all seized by British warships, signifying the end of the Haitian Revolution.
December 20, 1803	The Louisiana Purchase is completed at a ceremony in New Orleans.