Zinn initially opposed entry into World War II, influenced by his friends, by the results of the Nye Committee, and by his ongoing reading. However, these feelings shifted as he learned more about fascism and its rise in Europe. The book "Sawdust Caesar" had a particularly large impact through its depiction of Mussolini. Thus, after graduating from high school in 1940, Zinn took the Civil Service exam and became an apprentice shipfitter in the New York Navy Yard at the age of 18. Concerns about low wages and hazardous working conditions compelled Zinn and several other apprentices to form the Apprentice Association. At the time, apprentices were excluded from trade unions and thus had little bargaining power, to which the Apprentice Association was their answer. The head organizers of the association, which included Zinn himself, would meet once a week outside of work to discuss strategy and read books that at the time were considered radical. Zinn was the Activities Director for the group. His time in this group would tremendously influence his political views and created for him an appreciation for unions.