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What Happened Today in History on October 1

Explore the historical events that shaped our world on October 1st. From major milestones to cultural achievements, see what happened on this day in history. Dates for earlier events may be approximate.

Alexander the Great defeats Darius III of Persia in the Battle of Gaugamela, also called the Battle of Arbela. One of Alexander's finest victories and a major defeat for the Persians, leading to the end of the Persian Empire and to the fall of Darius III. More

Coronation of Queen Mary I of England and Ireland takes place at Westminster Abbey, London, This was the first coronation of a queen regnant in England, a female ruler in her own right. More

President Benjamin Harrison signed the law that created Yosemite National Park. More

The first modern World Series in baseball begins between the Boston Americans (now Red Sox) and the Pittsburgh Pirates.

Henry Ford introduces the Model T automobile to the market, revolutionizing the automotive industry. More

Scientific American reports that radio will soon be used to transmit music to the home. More

The People's Republic of China is proclaimed by Mao Zedong, Chairman of the Chinese Communist Party, (CCP), marking the establishment of a communist government in China.

American Express launches the American Express card. American Express previously had an international network of offices in place, and their traveler's' cheques had been accepted throughout the world for decades, this was the first credit card accepted internationally. More

Cyprus, officially the Republic of Cyprus, Independence day. The effective date of the London-Zürich Agreements was August 16 1960, but the public holiday was moved to October 1 to avoid summer heat and tourist season.

Nigeria, officially the Federal Republic of Nigeria, Independence Day from the UK.

Walt Disney World Resort opens in Orlando, Florida.

 Palau's Independence Day from the United States is celebrated annually on October 1st. On this date in 1994, Palau became a fully independent and sovereign nation, officially ending the UN Trusteeship administered by the United States. The occasion marks a significant milestone in Palau's history. 

The Affordable Care Act, often referred to as Obamacare, begins its enrollment phase in the United States.

A mass shooting takes place at Umpqua Community College in Oregon, USA, leaving multiple people dead and injured.

A mass shooting occurs at the Route 91 Harvest music festival in Las Vegas, USA, leaving 58 people dead and hundreds injured.