When the maneuverable siege cannon came into use in the 15th century, military engineers had to rethink medieval-style fortifications, whose tall, broad walls were highly vulnerable to cannon fire. They developed the star fort, or trace italienne, a flat, tiered structure composed of low, thick walls embedded in ditches, whose complex shape allowed defensive cannons to cover interlocking fields of fire. What technologies eventually rendered the star fort's intricate geometry irrelevant? Discussfrom Article of the Day http://ift.tt/2ihlICG
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