Introduction - ThinkEdu Blog | Thinking, Teaching ...
Sep 17 1778 – The Treaty of Fort Pitt is signed. It is the first formal treaty between the United States and a Native American tribe (the Lenape or Delaware Indians). Sep 17 1862 – Civil War: The Allegheny Arsenal explosion results in the single largest civilian disaster during the war. 78 workers, mostly young women, were killed. ................
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