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September
3

September 3 has witnessed the signing of treaties, declarations of war, and pivotal political moments.

On This Day in History

1783
Politics

Treaty of Paris Signed

The Treaty of Paris was signed by representatives of King George III and the United States, formally ending the American Revolutionary War. Britain recognized American independence and ceded vast territories.

1939
War & Conflict

Britain and France Declare War on Germany

Following Germany's invasion of Poland, Britain and France declared war on Nazi Germany. Prime Minister Neville Chamberlain's somber radio address informed the British people that they were at war.

1658
Politics

Oliver Cromwell Dies

The Lord Protector of the Commonwealth of England died on the anniversary of his greatest victories. Cromwell had transformed England from a monarchy into a republic, though the monarchy was restored two years later.

1189
Politics

Richard I Crowned King of England

Richard the Lionheart was crowned King of England at Westminster Abbey. He would spend most of his reign fighting in the Crusades and became one of medieval England's most legendary monarchs.

1976
Science

Viking 2 Lands on Mars

NASA's Viking 2 lander touched down on Mars's Utopia Planitia, joining its twin Viking 1 in the search for Martian life. The landers operated far beyond their planned 90-day missions.

301
Politics

San Marino Founded

According to tradition, Saint Marinus founded the Republic of San Marino, making it the world's oldest surviving sovereign state. The tiny nation has maintained its independence for over 1,700 years.

1995
Technology

eBay Founded

Pierre Omidyar launched AuctionWeb, which would become eBay, as an online auction platform. The site revolutionized e-commerce and created the world's largest online marketplace.

All Days in September

September 1 September 2 September 3 September 4 September 5 September 6 September 7 September 8 September 9 September 10 September 11 September 12 September 13 September 14 September 15 September 16 September 17 September 18 September 19 September 20 September 21 September 22 September 23 September 24 September 25 September 26 September 27 September 28 September 29 September 30