TOP SECRET GUARD Apart from the virtual impossibility of forecasting the course of any battle, the data on which this particular study would be carried out would be so incomplete particularly in relation to the Allied Strategic Air Plan that it is doubtful if the result would be much more accurate than the arbitrary assumptions referred to in (b) above. (c) For the Chiefs of Staff to ask the U.S. Joint Chiefs of Staff for their assessment, which would presumably be based on fuller information especially in the field of Air Strategy.