Cavalcade of America is an anthology drama series about historical events using stories of individual courage, initiative and achievement, that was sponsored by the DuPont Company. It was initially broadcast on radio from 1935 to 1953. 

The series was intended to improve DuPont's public image after World War I. The company's motto, "Maker of better things for better living through chemistry," was read at the beginning of each program, and the dramas emphasized humanitarian progress.

The show started as part of a successful campaign to reinvigorate DuPont. In the early 1930s, the Nye Committee investigations concluded that DuPont had made a fortune profiteering in World War I.  The negative effects of the investigation left the company demoralized, directionless and with a tarnished corporate image in the middle of the Great Depression.

According to DuPont public relations executives, the goal was not to directly sell their products, but rather to explain the company's goals and foster the confidence, respect and goodwill of the public.  https://en.wikipedia.org/wiki/Cavalcade_of_America