Portal:United States/Anniversaries/September/September 6
- 1620 – The Pilgrims sail from Plymouth, England on the Mayflower to settle in North America. (Old Style date; September 16 per New Style date.)
- 1628 – Puritans settle Salem, which became part of Massachusetts Bay Colony.
- 1781 – American Revolutionary War: The Battle of Groton Heights takes place, resulting in a British victory.
- 1870 – Louisa Ann Swain of Laramie, Wyoming becomes the first woman in the United States to cast a vote legally after 1807.
- 1901 – Leon Czolgosz, an unemployed anarchist, shoots and fatally wounds US President William McKinley (illustration pictured) at the Pan-American Exposition in Buffalo, New York.
- 1962 – The United States government begins the Exercise Spade Fork nuclear readiness drill.