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Map of Salem Neck Showing Defenses - Public domain map

"Fortifications Map File" Plans of Military Forts

[Plan of Fort Sumner, Montgomery County, composed of Redoubts Cross, Davis, and Kirby and also showing nearby rifle pits and Batteries Alexander and Benson, part of the defenses of Washington, D. C. ]

"Fortifications Map File" Plans of Military Forts Public domain scan of a plan of settlement buildings, free to use, no copyright restrictions image - Picryl description

[Sketch of the action at Roanoke Island, N. C., February 8, 1862, showing Confederate defenses, positions of Federal and Confederate gunboats and Federal transports, the landing place, and the site of the battleground.]

North Carolina

[Map of Cumberland Gap and surrounding area in Tennessee, Virginia, and Kentucky showing defenses, military installations, and roads.]

"Fortifications Map File" Plans of Military Forts

Sketch of the Defenses of Pittsburg [sic] made by order of Captain Craighill, Corps of Engrs., USA, July 20th, 1863 By B. W. O'Grady

"Fortifications Map File" Plans of Military Forts

Sketch showing the triangulation of the principal Defenses of the District of Columbia executed under the general direction of Col. J. N. Macomb, U. S. Topl. Engrs., by Charles A. Schott, Asst., U. S. Coast Survey, January to May 1863.

Maryland, the District of Columbia, and the Potomac River

Map of Charleston, South Carolina Showing Defenses

"Fortifications Map File" Plans of Military Forts

Topographical Map of the Approaches and Defenses of Knoxville, E. Tennessee, Shewing the Positions Occupied by the United States & Rebel Forces during the Siege. Surveyed by direction of Capt. O. M. Poe, Chf. Engr., Dept. of the Ohio, during Dec., Jan., and Feb., 1863-4, by [signed] Cleveland Rockwell, Sub. Asst., U.S. Coast Survey, [and] R. H. Talcott, Aid ... Drawn by C. Rockwell.

Kentucky and Tennessee

Map of Jacksonville and vicinity, Florida, [showing defenses]. Surveyed April 1864. [Signed] Wm. H. Dennis, U. S. Coast Survey.

Florida

Stevenson, Ala., Showing the Defenses of the Post erected after Plans of Col. Merrill, Chief Engr., D[epartment of the] C[umberland]. By Major P. V. Fox, 1st Mich. Engr's. Surveyed & Plotted by 1st Lieut. C. A. Ensign, 1st Mich. Engr's. September 1864.

"Fortifications Map File" Plans of Military Forts Public domain scan of a plan of settlement buildings, free to use, no copyright restrictions image - Picryl description

Map of Jefferson City, Mo., and Vicinity, showing the line of defenses. Wm. Hoelcke, Captn. & Addl. A. de. C., U.S.A., Chief Engl., Departt. of the Mo.

"Fortifications Map File" Plans of Military Forts

Rebel Defenses of Galveston and Vicinity, Surveyed and Drawn by order of G. L. Gillespie, Brevet Major & Chief Engineer, Miliary Division of the Gulf, Under the Direction of Lt. S. E. McGregory, Comdg. Topl. Party, Oct. 1865.

Arkansas, Missouri, Iowa, Texas, and all areas between the Mississippi River and the Rocky Mountains

Wire defenses at Zeebrugge, Belgium. 10-23-1918

British Photographs of World War I Public domain photograph - British army, military forces, during World War One, free to use, no copyright restrictions image - Picryl description

Aggressors in camouflage and armed with M-16 rifles begin their infiltration of a camp's defenses during exercise Prime Beef. The men are from the 4392nd Civil Engineering Squadron

The original finding aid described this photograph as: Subject Operation/Series: PRIME BEEF Base: Vandenberg Air Force Base State: California (CA) Country: United States Of America (USA) Scene Camera Opera More