“…He thought that it might result from excessive work and mental strain, and it was characterized by good recovery with rest. In the second world war good personality breakdown came to receive its full recognition and formulation, and was described in servicemen by Sargant and Slater (1940), Garmany (1944), Weinberg (1946), and Tredgold (1948) and in civilians by Gillespie (1942) and Ling (1944). Finally, Appel and Beebe (1946) showed that almost all men in rifle battalions became psychiatric casualties if they remained in a combat area for more than 200 to 240 aggregate combat days, and that a man reached his effective peak in 90 days.…”