Sally port

The entrance is usually protected by some means, such as a fixed wall on the outside, parallel to the door, which must be circumvented to enter and prevents direct enemy fire from a distance.

From around 1600 to 1900, a sallyport was a sort of dock where boats picked up or dropped off ship crews from vessels anchored offshore.

A sally, ultimately derived from Latin salīre (to jump), or "salle" sortie, is a military maneuver, typically during a siege, made by a defending force to harass isolated or vulnerable attackers before retreating to their defenses.

[citation needed] An extract from a 19th-century dictionary of military terms describes a sallyport thus: those underground passages, which lead from the inner to the outward works ; such as from the higher flank to the lower, to the tenailles, or the communication from the middle of the curtain to the ravelin.

A sallyport may be an enclosed garage type building or a securely fenced or walled open-air parking area.