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September 3rd in History

1783: The American 'War of Independence' comes to an end, when Britain signs a treaty in Paris
1939: Britain and France declare war on Germany, starting World War 2
1967: Sweden changes to driving on the on the right side of the road, in common with most of Europe
1976: The US spacecraft Viking 2 successfully lands on Mars

September 3rd birthdays

1913: Alan Ladd, American film actor
1940: Pauline Collins, British actress