 For the first time in U.S. history, American psywarriors employed electronic psywar in the field, in September 1944.Engineers of the 1st Radio Section of the 1st MRBC recorded POW interviews for front- line broadcasts, and reproduced the sound effects of vast numbers of tanks and other motor vehicles for Allied armored units in attempts to mislead German intelligence and lower enemy morale.Leaflets were delivered principally from aircraft, but also with artillery shells.