Testimonial
The testimonial technique is used to persuade the audience by using important or popular figures that advocate the product or statement made by the advertiser. This is an renowned image of Uncle Sam recruiting soldiers for the US army for World War I and World War II. Uncle Sam is an imaginary yet very important and respected figure in the United States, because he represents the United States of America itself. By portraying this significant figure as an advocate of men joining the army, the government of the United States convinces men to enlist.