Portal:United States/Anniversaries/March/March 22

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• 1621 – The Pilgrims of Plymouth Colony sign a peace treaty with Massasoit of the Wampanoags.
• 1622 – Algonquian Indians kill 347 settlers around Jamestown, Virginia, a third of the colony's population, in the Jamestown massacre.
• 1765 – The British Parliament passes the Stamp Act that introduces a tax to be levied directly on its American colonies.
• 1871 – In North Carolina, William Woods Holden becomes the first governor of a U.S. state to be removed from office by impeachment.
• 1933 – President Franklin Delano Roosevelt signs into law a bill legalizing the sale of beer and wine.
• 1941 – Washington State's Grand Coulee Dam (pictured) begins to generate electricity.
• 1960 – Arthur Leonard Schawlow and Charles Hard Townes receive the first patent for a laser.

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