Fortification, Military Science & History of Defense Structures

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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, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
Fortification - Wikipedia
Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
Fortification, Military Science & History of Defense Structures
Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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Fortification, Military Science & History of Defense Structures
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