Augmentation is the act of increasing a statement or information (especially in size or amount or degree) by addition.
By using this tactic, the propagandist tries to extend, or enlarge, the original statement. The information rides on the exposure of some arbitrary topic (Coca Cola, Earthquakes, the economy, the war, etc.) and, subtly, augments the original message to carry the propagandist's own message along with it. When applied with skill, the recipient will not notice the added part, but only the original message. The augmented message will be accepted uncritically as a basic premise.