Fortification, Military Science & History of Defense Structures

Fortification, in military science, any work erected to strengthen a position against attack. Fortifications are usually of two types: permanent and field. Permanent fortifications include elaborate forts and troop shelters and are most often erected in times of peace or upon threat of war. Field

Fortification - Wikipedia

5 Odd Military Fortifications: Unconventional Defenses

Fortification - Wikipedia

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Fortification in the Wilderness: The Defenses of Fort Necessity - Fort Necessity National Battlefield (U.S. National Park Service)

fort and fortification - Students, Britannica Kids

THE MODERN AND CONTEMPORARY FORTIFICATION: Fundacio Privada Cultural

Hellenistic fortifications - Wikipedia

Fortified THE SHELF

Fort Hancock and Sandy Hook Proving Ground National Historic Landmark - Gateway National Recreation Area (U.S. National Park Service)

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PDF) PROSPECTS OF MODERN FORTIFICATION

Fortification - Wikipedia