Decamp is archaic English, redeploy is what is currently in vogue, but recall would be the correct antonym for deploy.
E.g. "The deployed Soldiers were recalled by the sound of the Bugle."
Hope...
The opposite (antonym) of antonym is synonym. An antonym is a word that means the opposite. A synonym is a word that means the same thing, or nearly the same thing, for a given context.
Some words do not have direct opposites [antonyms]. Antonyms do not usually substitute for phrases. The phrase "you are" has no antonym. A contrasting version of "you are" is "you are not".