There was inital panic amongst officals because of the real fear was that these balloons might carry a biological attack. American intelligence sources had already heard rumors of the Japanese Unit Number 731, which was experimenting with plagues on prisoners of War in Machuria. Some 200,000 of these unwilling test subjects, mostly Chinese, would die. American authorities clamped a total press blackout on any information concerning the balloons, to prevent the Japanese from learning of their effectiveness. Meanwhile, a search was begun to find their launching point. The Military Geology Unit within the U.S. Geological Survey, provided the answer.
Wars are not fought merely by armies. And their violence does not cease merely because a peace treaty is signed.
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