Credit: Library of Congress
Constructed in 1778 to protect the lead ore supplies of the Sinking Spring Valley so needed for ammunition, Fort Robertdeau was one of the many frontier forts Pennsylvanians built during the American Revolution.
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A View of Fort Robertdeau, in Sinking-Spring Valley, State of Pennsylvania," 1788.
Credit: Library of Congress
Constructed in 1778 to protect the lead ore supplies of the Sinking Spring Valley so needed for ammunition, Fort Robertdeau was one of the many frontier forts Pennsylvanians built during the American Revolution.
