Among the options considered for that conflict: using the lessons of “Hiroshima” to wipe out whole cities at once, targeting the “civilian population wherever necessary.”

The course, first reported by Danger Room last month and held at the Defense Department’s Joint Forces Staff College, has since been canceled by the Pentagon brass. It’s only now, however, that the details of the class have come to light. Danger Room received hundreds of pages of course material and reference documents from a source familiar with the contents of the class.

The chairman of the Joint Chiefs of Staff recently ordered the entire U.S. military to scour its training material to make sure it doesn’t contain similarly hateful material, a process that is still ongoing. But the officer who delivered the lectures, Army Lt. Col. Matthew A. Dooley, still maintains his position at the Norfolk, Virginia college, pending an investigation. The commanders, lieutenant colonels, captains and colonels who sat in Dooley’s classroom, listening to the inflammatory material week after week, have now moved into higher-level assignments throughout the U.S. military.