Awesome rabbit hole. "The phrase “psychological warfare” is reported to have first entered English in 1941 as a translated mutation of the Nazi term Weltanschauungskrieg(literally, worldview warfare)" "Similar innovations soon spread through other military branches, usually initiated by creative outsiders from the worlds of journalism or commerce who saw “psychological” techniques as a means to sidestep entrenched military bureaucracies and enhance military performance. Assistant Secretary of War John J. McCloy, a longtime Wall Street colleague of Donovan, established a small, highly secret Psychologic Branch within the War Department General Staff G-2 (Intelligence) organization. (McCloy is probably better known today for his later work as U.S. high commissioner of Germany, chairman of the Chase Bank, member of the Warren Commission, and related posts). 36 McCloy’s Psychologic Branch was reorganized several times, briefly folded in the OSS, shifted back to military control, and renamed at least twice." John J. McCloy and the Black Tom Explosion. "McCloy went to New York to become an associate in the firm of Cadwalader, Wickersham & Taft, which was then one of the nation's most prestigious law firms. He moved to Cravath, Henderson, & de Gersdorff in 1924, where he worked with many wealthy clients, such as the St. Paul Railroad. In 1934 McCloy found new evidence allowing him to re-open an action for damages against Germany for the destruction caused by the 1916 Black Tom explosion. He did a great deal of work for corporations in Nazi Germany and advised the major German chemical combine I. G. Farben, later notorious for manufacturing Zyklon B. By the time he left for government service in 1940, McCloy earned about $45,000 a year and had savings of $106,000. His involvement in litigation over a World War I sabotage case gave him a strong interest in intelligence issues and in German affairs.[7]" Aftermath of Black Tom the birth of US Domestic Intelligence Agencies. "The Black Tom explosion resulted in the establishment of domestic intelligence agencies for the United States.[44] The then Police Commissioner of New York, Arthur Woods, argued, "The lessons to America are clear as day. We must not again be caught napping with no adequate national intelligence organization. The several federal bureaus should be welded into one and that one should be eternally and comprehensively vigilant." Just getting started. Food for thought. McCoy had very strong ties to early US Psychological Warfare and also a major player in the decision to inter US Japaneses citizens also involved in opposition to bombing Auschwitz not to mention legally advised I. G Farben prior to the war, the company that made Zyklon B. Edit almost forgot 1947 to 1949 second President of the World Bank!