Disinformation, noun.
1. Deliberately misleading information announced publicly or leaked by an organization, government or especially by an intelligence agency in order to influence public opinion or the government in another nation: “He would be the unconscious channel for a piece of disinformation aimed at another country's intelligence service” (Ken Follett).
2. Dissemination of such misleading information.
—attributive.
Often used to modify another noun: disinformation operations; disinformation experts.
[Possibly translation of Russian dezinformatsiya.]
Maybe we need a reminder from time to time that the FDS manual includes a proviso to "be wise as serpents" in their war strategy.
Maximus