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BASTION (through the Fr. from See also: work forming See also: part of a See also: line of fortifications
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The general trace of a bastion is similar to an irregular pentagon formed by a triangle and a narrow rectangle, the See also: base of the triangle coinciding with the long See also: side of the rectangle
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The two sides of the triangle See also: form the " faces " of the bastion, which join at the " salient " angle, the See also: short sides of the rectangle form the "flanks." Bastions were arranged so that the fire from the flanks of each protected not only the front of the See also: curtain but also the faces of the adjacent bastions
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A " tower bastion " is a See also: case-mated tower built in bastion form; a " demi-bastion " is a work formed by See also: half a bastion (bisected through the salient angle) and by a parapet along the line of bisection; a " flat bastion " is a bastion built on a curtain and having a very obtuse salient angle
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