Propaganda is a powerful weapon in war; it is used to dehumanize and create hatred toward a supposed enemy, either internal or external, by creating a false image in the mind. This can be done by using derogatory or racist terms, avoiding some words or by making allegations of enemy atrocities. Most propaganda wars require the home population to feel the enemy has inflicted an injustice, which may be fictitious or may be based on facts. The home population must also decide that the cause of their nation is just. In NATO doctrine, propaganda is defined as "Any information, ideas, doctrines, or special appeals disseminated to influence the opinion, emotions, attitudes, or behaviour of any specified group in order to benefit the sponsor either directly or indirectly." Within this perspective, information provided does not need to be necessarily false, but must be instead relevant to specific goals of the "actor" or "system" that performs it.