Fort Delaware in the War of 1812

From Wikipedia.

On Pea Patch Island in the Delaware River.

After the island was given to the federal government by Delaware for the construction of a fortification, not a whole lot was done during the war.  What was done was directed largely by Captain Samuel Babcock, who also worked on the defenses of Philadelphia.

A seawall and dykes were built around the island but there was no evidence that an actual fort of any sort was on the island when the war ended.  A martello tower was planned for it.

Construction of a star fort began on the island December 8, 1817.  Chief engineer Joseph Totten designed the fort.

--Brock-Perry

Delaware's Joseph Haslet, War Governor-- Part 3: Rush to Lewes, Delaware

For protection against the British, an encampment was built at "The Rocks" in Wilmington, Delaware.  Captain Caleb P. Bennett fortified New Castle and Pea Patch Island was deeded over to the U.S. government so that a fort could be built on it.  That fortification eventually became Fort Delaware.

Lewes was particularly vulnerable to the British and received repeated requests/demands for provisions.  These were refused.

Governor Haslet and his militia rushed to the town's defense.

--Brock-Perry