Today in history 9

Here are some historical events that occurred on September 9th:

1. 1752 - The British Empire adopts the Gregorian calendar, which is the calendar used by most of the world today.
2. 1814 - The Treaty of Paris is signed, officially ending the War of 1812 between the United States and the British Empire.
3. 1863 - The Battle of Chickamauga begins during the American Civil War.
4. 1886 - The first commercial electric streetlights are installed in Wabash, Indiana.
5. 1914 - The first tank is used in combat during World War I, by the British Army.
6. 1922 - The British Broadcasting Corporation (BBC) is founded.
7. 1941 - The Soviet Union begins its invasion of Poland, which had been invaded by Germany just a few days earlier.
8. 1956 - The Soviet Union launches Sputnik 2, which carries the dog Laika into space.
9. 1965 - The first episode of the popular TV show "Star Trek" airs on NBC.
10. 1986 - The Soviet Union launches the Mir space station, which will remain in orbit for 15 years.

I hope you find these events interesting!