Creation of a favourable "atmosphere" is the first object of propaganda. Until this psychological effect is produced (as the result of military events, of propagandist activity or of internal political disaffection) the mentality of enemy troops and civil population—and both are equally important in modern warfare—will be naturally unsympathetic and unresponsive to influence. In order to produce this "atmosphere" of receptivity and susceptibility, continuity of propaganda policy is indispensable. This presupposes definition of sound policy, based upon comprehensive knowledge of the facts and of the developments of the political, military, and economic situation, and also of the enemy psychology.
When a line of policy has been laid down, actual propaganda operations may be begun, but not before. First of all axioms of propaganda is that only truthful statements be made. Secondly, there must be no conflicting arguments, and this can only be ensured by close co-operation of all propagandists and by strict adherence to the policy defined. A false step may possibly be irretrievable.
Owing to inattention to these cardinal principles of propaganda against an enemy—
