Tennessee Secretary of State Tre Hargett
Tennessee State Library and Archives
Civil War Resources
Civil War Source Book
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| Indented or Cremaillere Line: | A continuous line of alternating (zigzag) long and short faces constructed perpendicular to each other. The reenterings were arranged so as to provide for crossfire in front of them. |
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| Inundations: | Water inundations were created by damming streams that passed in front of a field fortification. This type of obstacle was rarely used during the Civil War, but at Knoxville, Tennessee, sections of the Federal defenses were partially protected by damming several creeks. |
| Interior Slope: | The angle of the parapet wall extending between the superior slope and the banquette. |
| Ironclad: | A ship or boat that was sheathed in thick iron plate. Ironclad ships were in use in Europe before 1861, but not until the American Civil War did any ironclad vessels fight one another. |