It was only in June 1938 that Beck realised that Hitler was behind the drive for war. In a memorandum to Brauchitsch, Beck urged that all of the senior officers threaten a mass collective resignation to force Hitler to abandon his plans for "Fall Grün" in 1938. Beck ended his appeal to Brauchitsch: "If they all act together, then it will be impossible to carry out military action... If a soldier in a position of highest authority in such times see his duties and tasks only within the limits of his military responsibilities, without consciousness of his higher responsibility to the whole people, then he shows a lack of greatness, a lack of comprehension of responsibility. Extraordinary times demand extraordinary actions!"