An advance into enemy territory, an attempted invasion; an encroachment, an incursion.
Often followed by in, into, or on: initial progress made toward accomplishing a goal or solving a problem.
An attack made by troops from a besieged position; a sally.
An operational flight carried out by a spacecraft involving a return to Earth.
An operational flight carried out by a single military aircraft.
An act of venturing out to do a task, etc.
An act of trying to enter a new field of activity.
An attacking move.
Synonym of sally port (“an entry to or opening into a fortification to enable a sally”)
A series of aerial photographs taken during the flight of an aircraft; (by extension) a photography session.
To carry out a sortie; to sally.