| Sally Port |
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| medieval defenses | |
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| type of gate | |
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A Sally port is a small, easily secured door in a Castle wall or other Fortification . During a Siege , defending raiding parties would "sally forth" or " Sortie " from these ports and attack the besiegers. These raids would attempt to slow the offensive siege process. Targets for these raids included tools which could be captured and used by the defenders, labour-intensive works such as trenches and mines, and Siege Engines and Siege Towers . Sometimes enemy labourers were also targeted. Another meaning for Sally port, derived from the French words for room "salle" and door "port", is a small controlled space with two doors. Essentially, one must enter the space and close the first door before opening the second to proceed. Modern sally ports are used to control entry into highly classified areas and a guard will often occupy the middle space checking credentials of anyone wants to pass through the second door. Sally ports are also used to restrict the flow of people to one at a time so that intruders cannot pass into the classified area on a cleared person's coattails. Sally port may also be from the latin 'salire' meaning to rush. The common French word used to describe a Sally port is "poterne." SOURCE |
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