In 1931, MacKaye noted that a mass of literature had been devoted to the justification of adult education but that little had been devoted to how to teach adults. He added that adult education was “essentially an act of war” and that the adult education instructor had to have the skills and knowledge or “tactical training” which would prepare him for the “trenches.” This chapter determines a core of common skills and knowledge which adult educators of the future would need to gain in order to perform their jobs adequately, and the learning experiences most appropriate in obtaining the more important skills and knowledge. It is designed to secure information which would lead to the skills and knowledge needed by the adult educator of the coming decade. The American Association for Adult Education, founded in 1926, issued its first periodical, Adult Education Journal, in 1929.