Following the conquest of New Netherland in 1664, the territory that would later become New York State was ceded to the English. To maintain peace in Albany, Fort Frederick was constructed in 1676 to replace the then decaying Fort Orange. Fort Frederick…
https://museum.dmna.ny.gov/forts/albany
Fort Alden was constructed in 1778, in Cherry Valley, Ostego County, New York, and remained intact for only two years during the Revolutionary War. The facility was named for Colonel Ichabod Alden, who commanded the fortress. Alden, along with fifteen o…
https://museum.dmna.ny.gov/forts/alden
The Amersfoort Blockhouse was a Dutch fortification founded in 1630 and decommissioned in 1664. It was located in the flatlands of Brooklyn, in Kings County, New York. It is likely named for the Dutch city of Amersfoort, founded in 1259.
https://museum.dmna.ny.gov/forts/amersfort