 Milius participated more than ever in the labor movement, and assisted Harry Sternberg in creating the painting "Epoch of a Great City", when he came to Lakeview, Illinois to complete the mural at a post office.The two visited stockyards and workers districts, gaining inspiration for the piece.Milius also became active in the Packinghouse Workers Organizing Committee, painting banners, creating illustrations for publications and disturbing those leaflets.