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

Spy Satellites Over Syria Reveal Hundreds of Ancient Roman Forts - Archaeology

Fortification - Wikipedia

Colonial Coastal Fortifications - New Georgia Encyclopedia

Urban Warfare Project Case Study #1: Battle of Stalingrad - Modern War Institute

Fortification, Military Science & History of Defense Structures

Fortification, Military Science & History of Defense Structures

Military defense: From Trenches to Sandbags: Military Defense Tactics - FasterCapital

Hellenistic fortifications - Wikipedia

Are forts obsolete in modern warfare? - Quora