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Thomas Barclay negotiated a treaty in 1786 that was then signed by Thomas Jefferson, John Adams and Muhammad III. This treaty is now the longest-standing US treaty. What nation (besides the US) was part of this 'Treaty of Friendship'?

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Fact: 12 of the US presidents owned slaves, and 8 of them enslaved people while in office.


1. Thomas Barclay negotiated a treaty in 1786 that was then signed by Thomas Jefferson, John Adams and Muhammad III. This treaty is now the longest-standing US treaty. What nation (besides the US) was part of this 'Treaty of Friendship'?





 
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