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The Battle of Brandywine, fought September 11, 1777, was one of the bloodiest in the region. The park includes George Washington's rebuilt headquarters and Marquis de Lafayette's headquarters.
The Brandywine Battlefield Historic Site is a National Historical Landmark. The historic park is owned and operated by the Pennsylvania Historical and Museum Commission, on 52 acres (210,000 m2), near Chadds Ford, Delaware County, Pennsylvania in the United States.
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