Alarmed by information gathered by the
Military Intelligence Division (MID) that alleged an imminent domestic communist uprising,
Brig. Gen. Marlborough Churchill sent a memorandum to Director of the War Plans Division,
Maj. Gen. William G. Haan, in October 1919 warning of the potential for rebellion. War Plan White began being drafted in earnest in the winter of 1919-20 with the help of intelligence reports from the MID, which were oftentimes drawn up based on information collected from the surveillance of citizens and resident aliens suspected of having communist sympathies. On 24 May 1920,
Secretary of War Baker authorized expansion of War Plan White to comprehensively deal with domestic insurrections, regardless of the political ideology of the would-be insurrectionists. Responsibility for the creation of the plan was divided between the
War Department and the 9
corps areas that made up the military. Overseas commands in U.S. territories like
Hawaii and the
Panama Canal were tasked with developing their own plans. While each corps area developed a plan specific to that corp area's ability, the War Plans Division retained overall control of the project. The MID continued to play an integral role in the development of War Plan White by supplying those tasked with its development with intelligence regarding the alleged presence and movements of supposed radicals in cities like
New York,
Chicago,
Denver, and
Seattle. One report estimated that the United States harbored 322,284
Red radicals, 914,854
socialists, 42,950 socialist laborers, and 2,475,371 "unorganized
Negroes." The accuracy of these reports is questionable, and their sourcing is unknown. The MID's impact on the development of each local Emergency Plan White, however, was significant. Officers drafting their respective corps area's planned around the MID's estimates, as these officers were incapable of evaluating the threat of local radicals by themselves. The MID also procured contingency plans from foreign powers, such as the
United Kingdom, so that each corps area could utilize them as references. and authorized the drafting of War Plan White == Outline ==