A sortie is a deployment or dispatch of one military unit, be it an aircraft, ship, or troops, from a strongpoint. The term originated in siege warfare.
A Venetian sortie during the Siege of Candia (1668)
Gari Melchers War Highsmith
A sallyport is a secure, controlled entry way to an enclosure, e.g., a fortification or prison. The entrance is usually protected by some means, such as a fixed wall on the outside, parallel to the do
Sortie
…troops against the enemy from a defensive position—that is, a counterattack launched against the besiegers by the defenders. If the sortie is through a sally port, the verb to sally may be used interchangeably with to sortie. Purposes of sorties include harassment of enemy troops, destruction of siege weaponry…
A sallyport in the flank of a bastion at Dömitz Fortress in Mecklenburg-Vorpommern, Germany
A blocked-up medieval sallyport at the Cittadella in Gozo, Malta
The Old West Sallyport at Edinburgh Castle in Scotland
Razor wire topped metal fencing and sliding gate secure the entry to a vehicular sallyport, in Hagerstown, Maryland, U.S.A.