Change-iff
From FreeSpace Wiki
change-iff Change IFF (Action operator) Sets the specified ship(s) or wing(s) to the specified team. Takes 2 or more arguments... 1: Team to change to ("friendly", "hostile" or "unknown"). Rest: Name of ship or wing to change team status of.
Comments
The change IFF sexp can be used by mission designers so that when called, it will change the IFF of a given ship so that it can effectively change alliegance. It can also be used to change the Player's IFF simulating desertion or Command's wrath at messing up in some way.