In fortification, a coffer is a hollow lodgment against a dry moat, the upper part being made of pieces of timber raised about two feet above the level of the moat. This elevation has hurdles filled with earth which serves as a parapet with embrasures.
In fortification, a coffer is a hollow lodgment against a dry moat, the upper part being made of pieces of timber raised about two feet above the level of the moat. This elevation has hurdles filled with earth which serves as a parapet with embrasures.
Source: Wikipedia "Coffer (fortification)" · CC BY-SA 4.0
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