Disinformation is false or misleading information that is spread deliberately to deceive. This is a subset of misinformation, which may also be unintentional.
The English word disinformation is a loan translation of the Russian dezinformatsiya, derived from the title of a KGB black propaganda department. Joseph Stalin coined the term, giving it a French-sounding name to claim it had a Western origin. Russian use began with a "special disinformation office" in 1923. Disinformation was defined in Great Soviet Encyclopedia (1952) as "false information with the intention to deceive public opinion". Operation INFEKTION was a Soviet disinformation campaign to influence opinion that the U.S. invented AIDS. The U.S. did not actively counter disinformation until 1980, when a fake document reported that the U.S. supported apartheid.
The word disinformation did not appear in English dictionaries until the late-1980s. English use increased in 1986, after revelations that the Reagan Administration engaged in disinformation against Libyan leader Muammar Gaddafi. By 1990, it was pervasive in U.S. politics; and by 2001 referred generally to lying and propaganda. 
Psychological Manipulation through means of propaganda and Information Warfare was once limited within the scope of the Controller Pillars of Society, via countries, states, militaries, and intelligence agencies. Today, even everyday people have become important players in these media campaigns involving access to credible and high quality information or straight out disinformation campaigns in this new media landscape. Aggressive battles over access to information and the shaping of narratives have become an integral part of shaping societal views and the public’s perception of the nature of reality, which includes current war agendas and global-economic politics. During the Ascension Cycle, the Collective Consciousness moves towards Open Source systems in which to gain more access to information, truth and knowledge, that which had been previously unseen and remained hidden from the ordinary citizens. 
Ignorance vs. Intelligence
Those that have the most knowledge, intelligence and conscious awareness of what is really happening in world events will have the most strategic advantage. Those that do not have access to accurate awareness of events or truthful knowledge, but instead are manipulated and deceived to believe false impressions and illusions, will be at a greater disadvantage. Knowledge of the truth is power. Managing intelligence and controlling access to information includes supplying the perceived enemy or opponent with disinformation, in order to trick them into making the wrong decisions based on lies. In the current Information Warfare climate diminishing easy access to open source knowledge and sharing of information freely within the global community, it is an important concept to understand.