A military action consisting of armed forces of one geopolitical entity entering territory controlled by another such entity, generally with the objective of conquering territory or altering the established government.
The breaching of the skin barrier.
The spread of cancer cells, bacteries and such to the organism.
The entry without consent of an individual or group into an area where they are not wanted.
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.