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Today in History: October 27

Microsoft News | Slide 1 of 16: Pinckney's Treaty (Treaty of San Lorenzo) signed by Spain and U.S., establishing the southern boundary of the US and giving Americans right to navigate the Mississippi River.
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1795: Treaty of San Lorenzo

Pinckney's Treaty (Treaty of San Lorenzo) signed by Spain and U.S., establishing the southern boundary of the US and giving Americans right to navigate the Mississippi River.
© Stapleton Collection/Corbis/Getty Images
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