Abagadusset Fort, Maine – Near mouth of Kennebec River.
Abbot Fort, Virginia – On Appomattox River, near City Point.
Abercrombie Fort, North Dakota – On Red River, 2 miles below Grahams Point, Minn.
Abraham Lincoln, Fort, North Dakota – Near first called Fort McKean.
Accotink Fortifications at, Virginia
Adaes Mission Fort, Texas – Fifteen miles west of Nacogdoches.
Adam Carson’s Fort, Pennsylvania – In Clinton County.
Adams Fort, Alaska – On Yukon River.
Adams T. B. Fort, Florida – On Caloosahatchee River.
Adams Fort, Massachusetts – Boston Harbor; now Fort Independence.
Fort Adams, Mississippi – At Loftus Heights, Mississippi River, in Wilkinson County,
Adams Cantonment, Missouri – Near Jefferson Barracks.
Adams Fort, Ohio – On St. Marys River, 25 miles north of Fort Recovery.
Adams Point Fort at Oregon- On Columbia River; now Fort Stevens.
Adams, Fort, Rhode Island – On Brentons Point, near Newport.
Adams General Hospital, Tennessee- At Memphis.
Adams Alva, Camp, Colorado- At Denver.
Advance Camp, Virginia – Near Centerville.
Advance Towers, Fort, Florida- Near Key West.
Alabama Fort, Alabama – On Coosa River, in Elmore County.
Alabama Fort, Florida – On Hillsboro River, 25 miles from Tampa Bay.
Alamo Fort, Texas- At San Antonio.
Albany Fort, New York- On Hudson River, near present site of Albany.
Albany Fort, Virginia – In Alexandria County.
Alburgh Springs Fort at, Vermont – In Grand Isle County.
Alcatraz Island Fortifications on, California – San Francisco Harbor.
Alderton Point, Battery at, Massachusetts
Alert Camp, California – Near San Francisco.
Alert Camp, Kansas – Name changed to Fort Larned.
Alexander Fort, Alaska. – On Bristol Bay.
Alexander Battery, Maryland – Near Washington.
Alexander Fort, Maryland – Three miles above Georgetown, D. C.; name changed to Redoubt Davis.
Alexander Fort, Montana -On Yellowstone River, opposite mouth of Rosebud River.
Alexander Fort, Virginia – At Petersburg.
Alexander Hayes, Fort, Virginia – At Petersburg.
Alexandria Fort, Alabama – Near Mobile.
Alexandria National Cemetery, Louisiana – At Pineville.
Alexandria National Cemetery, Virginia – At Alexandria.
Alexis Fort, Alabama – Near Mobile.
Alger Camp, Georgia – At Chickamauga Park.
Alger Camp, Virginia – Near Dunn L ring.
Algernon Fort, Virginia – At Old Point Comfort.
Alibamo Fort, Mississippi – On Yazoo River.
Allatoona Pass Fort at, Georgia – At Allatoona Pass.
Alleghany Camp, West Virginia – In Pocahontas County.
Alleghany Fort, Virginia – On the Beverly and Staunton turnpike.
Allegheny Arsenal, Pennsylvania – At Pittsburg.
Allen Fort, Pennsylvania – On Lehigh River.
Alton Prison, Illinois – At Alton.
Alton A Fort, Deleware – Near present site of Wilmington.
Alva Adams. Camp, Colorado- At Denver.
Alven Fort, New York – In Cherry Valley.
Alvin Saunders, Camp, Nebraska- At Lincoln.
Alvord Camp, Oregon- In Grant County.
Amanda Fort, Ohio- On Auglaize River, 60 miles southeast of Fort Wayne, Ind.
Amboy Flying Camp, New Jersey – At Perth Amboy.
Amelia Island, Forts on, Florida -Forts Clinch and St. George.
Amity Fort, Louisiana – At Amite City.
Ammen Fort, Tennessee- At Loudon.
Amory Fort, North Carolina- At Newbern.
Amsterdam Fort, New York – At New York City.
Anahuac Fort, Texas – In Chambers County.
Anastasia Island, Fort on, Florida – Fort Preston, near St. Augustine.
Anchusa Fort, Florida – At the entrance of Pensacola Bay.
Ancient Fort, Ohio. – On Miami River, in Warren County; now town of that name.
Andaraque Fort, New York- On Lake Champlain.
Anderson Camp, California – In Humboldt County.
Anderson J. W., Camp, California – At Sacramento.
Anderson Prison, Georgia – At Anderson ville.
Anderson Fort, Kentucky – At Paducah.
Anderson Fort, North Carolina -At Newbern, on the site of old Fort St. Philip.
Anderson’s Fort, Pennsylvania – At Petersburg.
Anderson Battery, Vermont – At Bermuda Hundred.
Anderson Fort, Virginia – At Petersburg.
Andersonville National Cemetery, Georgia – At Andersonville.
Andreavsky Fort, Alaska – On Yukon River.
Andrew Fort, Massachusetts – At Gurnet Point, 9 miles northeast of Plymouth.
Andrew Camp, Virginia – At Alexandria.
Andrew Johnson Camp, Kentucky – At Barboursville.
Andrews Fort, Florida – On Apalachee Bay.
Andrews Fort, Massachusetts – On Peddocks Island.
Androscoggin Fort, Maine – On Androscoggin River.
Angel Island Fort on, California – Now Fort McDowell.
Anill Fort, New York – At New York City.
Ann Fort Florida – On Indian River.
Annapolis Fortifications at, Maryland – Forts Horn, Madison, and Severn, and Naval Academy.
Annapolis National Cemetery, Maryland – At Annapolis.
Ann Fort, New York- On Wood Creek, in Washington County; now town of that name.
Anne Fort, Rhode Island – At Newport, on Goat Island.
Anne Run Fort, Maine – At Castine.
Annutteeliga Fort, Florida – At Brooksville.
Antes Fort, Pennsylvania – In Lycoming County.
Anthony Nose, Works at, New York.
Antietam National Cemetery, Maryland – At Sharpsburg.
Apache Fort, Arizona – On White Mountain River; first known as Camp Ord.
Apalachicola Arsenal, Florida – On Apalachicola River.
Apalachicola Fort, Florida – On Apalachicola River.
Appleby’s Fort, Pennsylvania- At Kittanning.
Apple River Fort, Illinois – At Elizabeth.
Aquia Creek Forts at, Virginia – On Potomac River.
Arbuckle Fort, Florida – On Lake Ishtopoga.
Arbuckle Camp, Indian Territory – On Red Fork of Canadian.
Arbuckle Fort, Indian Territory- On Washita River, in Chickasaw Nation
Arbuckle Camp, West Virginia – At Lewisburg.
Archangel Gabriel, Fort, Alaska. – On Baranoff Island.
Archangel Michael, Fort, Alaska.– On Baranoff Island.
Argyle Fort, Georgia- At Savannah.
Arivaypa, Fort, Arizona – In Pinal County; name changed to Fort Breckinridge.
Arkansas Post, Fort at. Arkansas – On Arkansas River; Fort Hindman.
Arkokisa Fort, Texas – On Trinity River.
Arlington National Cemetery, Virginia – Opposite Washington, D. C.
Armistead Fort, Florida – At Sarasota.
Armistead Fort, Maryland – At Hawkins Point, Patapsco River.
Armistead Fort, Tennessee – In Monroe County.
Armory Square General Hospital, D. C. – Washington.
Armstrong Fort, Alabama – On Etowah River, near the Coosa.
Armstrong Fort, Florida – At Dade’s Battle Ground.
Armstrong Fort, Florida – On Manatee River.
Armstrong Fort, Illinois – At Rock Island; now Rock Island Arsenal.
Armstrong Fort, Pennsylvania – At Kittanning.
Army and Navy General Hospital, Arkansas – At Hot Springs.
Arnold Fort, New York – At West Point.
Arnold Camp, Rhode Island – At Pawtucket.
Arrowsic Island, Fort on, Maine- Hammond’s Fort.
Arruinado Fort Florida – Pensacola Bay.
Ash Barracks, Tennessee – At Nashville.
Ashby’s Fort, West Virginia -At Frankfort.
Ashepoo Redoubt, South Carolina – In Colleton County.
Ashley Fort, Utah- On Utah Lake.
Ash’s Point, Fort, Maine- Near Goldsboro.
Assinniboine Fort, Montana – On Beaver Creek, Choteau County.
Assumption Fort, Illinois – On Ohio River, in Massac County.
Assumption Fort, Tennessee – At Memphis.
Astoria Battery at, New York – On Long Island.
Astoria Fort at, Oregon – Fort George.
Asylum General Hospital, Tennessee – At Knoxville.
Atcheson Camp, North Dakota – On Devils Lake, Ramsey County.
Atkinson Fort, Florida – On Suwanee River.
Atkinson, Camp, Georgia – At Atlanta.
Atkinson Fort, Iowa – On Turkey River, near mouth of Spring Creek, Winneshiek County; now town of that name.
Atkinson Fort, Kansas – On Arkansas River, in Ford County.
Atkinson Camp, Louisianna – On Lake Charles.
Atkinson, Fort, Nebraska – Near Council Bluffs.
Atkinson, Camp, West Virginia – At Charleston.
Atkinson, Fort, Wisconsin – On Rock River, at the head of Lake Koshkonong, Jefferson County; now town of that name.
Aubrey Fort, Kansas- On Arkansas River.
Au Fer Fort, New York – On Lake Champlain.
Augur General Hospital, Virginia – At Alexandria.
Augur Camp, Wyoming – On Little Wind River; name changed to Fort Washakie.
Augusta Arsenal, Georgia – At Augusta.
Augusta Fort, Georgia – At Augusta.
Augusta Arsenal, Maine – At Augusta.
Augusta, Fort at, Maine
Augusta Fort, Pennsylvania -At Sunbury.
Aurenea Fort, New York – At Albany.
Austin Arsenal, Texas- At Austin.
Frontier Forts – A Forts
Abagadusset Fort, Maine – Near mouth of Kennebec River.