In the 1940's during World War II Batman's costume appeared more friendlier than his standard military approach towards his war against crime. With this costume came a diplomatic, child-oriented Batman who took on a friendlier attitude going so far as to put his "I work alone" attitude aside going so far as to take on Dick Grayson as the Robin. Along with the friendlier attitude he also became one of the founding members of the Justice Society of America. He and Superman also met during this time, and they both took their battle to World War II in which they, held a war against the Axis powers. Even going so far as to take on Hitler in a less violent way than they would have done in the beginning.