I don’t know how many American tankers were scared of Unit 731 in Harbin, China. But I knew many who were scared shit of German 88’s in the bocage country of Normandy, France.
Unit 731 was about to initiate unrestricted biological warfare against the US West Coast when we dropped the atomic bombs on Hiroshima and Nagasaki. We got lucky and the submarine that was to begin carrying out the attacks decided to surrender instead of carrying out its mission. They might have killed millions.