Old Sow Battery (Oquaga): 1812-14, Erie County, Buffalo. Near present City Water Plant, earthwork with one 8 inch Mortar. To the North was Fort Tompkins, and to the South was the Gookins Battery.
https://museum.dmna.ny.gov/forts/old-sow
Oneida Carry Forts: 1755, Oneida County, Rome. The present City of Rome is located on the Oneida Carry. This was the portage passage between the western most navigatible part of the Mohawk River to the navigatible part of Wood Creek that led to Oneida Lak…
https://museum.dmna.ny.gov/forts/oneida-carry
Oneida Castle: Built in Sep 1756 near present Little Falls as a 120 Sq Ft Stockade with two 24 Sq Ft blockhouses at opposite corners. Built on orders of Sir Johnson for the Oneida Indians.
https://museum.dmna.ny.gov/forts/oneida-castle
Fort Ontario: The first British fort at Oswego was Fort Oswego in 1722 on the West side of the river. The British added Forts Ontario (East side) and George (West of Oswego) starting construction in September 1755. This original Fort Ontario (Also known a…
https://museum.dmna.ny.gov/forts/ontario
Orangeburg (NY-04 & 4R) Nike Base: 1955-74, launcher Area, State Route 303, N. Orangeburg. Located within current US Army Reserve Center. (NY-04R) Radar Site, 1958-59. Integrated Fire Control area and Search/Acquisition radar for area was at Mount Nebo.
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https://museum.dmna.ny.gov/forts/orangeburg-nike-base
Fort Orange: Dutch trading fort, Albany, on Hudson 1624, taken over by British 1664, replaced with Fort Frederick 1676. Replaced a previous Dutch trading fort 1615-17 (see Fort Nassau). This rendering by Leonard Tantillo was based on a Dutch map of Rensse…
https://museum.dmna.ny.gov/forts/orange
Oswego Falls Palisade: 1758, Oswego County, Village of Fulton. Also called Fort Bradstreet. Believed to have been built in 1758/9 at the carry around Oswego Falls on the east bank of the Onnadaga River (now Oswego River), adjacent to South First Street. S…
https://museum.dmna.ny.gov/forts/oswego-falls-palisade
1 - Fort Oswego: First British fort at Oswego started as a trading post in 1722 on the West bank of river, First and Lake Street, Oswego. In the summer of 1724, to counter Magazin Royal (Joncaire's Blockhouse) at Niagara, New Yorker's under orders of Gove…
https://museum.dmna.ny.gov/forts/oswego