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|Important Dates in Delaware
1609 English explorer Henry
Hudson sailed into present-day
1701 Delegates from
the Delaware territory petitioned Penn for a separate
legislature. The petition was granted.
1776 Delaware became a separate state and adopted its first constitution. New Castle was designated as the state capital.
September 3, 1777 American
troops met British troops at Coochs Bridge near Newark.
The outnumbered Americans retreated, ending the first and
only Revolutionary War battle to be fought in Delaware.
December 7, 1787
Delaware became the first state to ratify the United
1802 Éleuthère Irénée du Pont, a French immigrant, established a powder mill on Brandywine Creek near Wilmington.
1865 Slavery was abolished in Delaware.
1897 Delaware's present constitution was adopted.
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This page was last updated on June 09, 2017.