Tennessee Secretary of State Tre Hargett
Tennessee State Library and Archives
Civil War Resources
Civil War Source Book
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| Oblique Embrasure: | An embrasure that intersects a parapet at an acute angle. |
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| Obstacle: | A device or material, such as abatis or chevaux-de-frise, placed in front of a fortification or a passage to hinder attackers by breaking up the orderliness and momentum of an attack. It delayed enemy troops at a point in the field where defenders could most effectively sweep the enemy with gunfire. |