No need to apologize  My editorial comments are sometimes more curt or critical than they should be and this quite naturally elicits a strong reaction    The problem of ground pressure was wellunderstood by the US Army Ordnance Dept during WWII I find it difficult to identify any direct relationship between the Ts lower ground pressure and efforts by the US Army Ordnance Dept to achieve similar results  In fact designers of both tanks were simply reacting to the conditions imposed by the European battlefield and the Russians worked out the solution while the Americans were still getting the M ready for battle in the sands of N Africa   Keep in mind that the relatively few engagements involving Ts and Ms were fought mostly at relatively close ranges  This helped mask the penetration problems of the mm HVAP It was only marginally better than the AP shot round and led to a generalized misunderstanding of the tanks effectiveness against its Russian counterpart I have not heard of a mm Sherman seeing combat in Korea  In answer to your question about who was responsible for sending us out in undergunned death traps it was Lt Gen Leslie J McNair  A long time staffer McNair was a genius at organization but demonstrated very little understanding of or for that matter any willingness to learn about the actual effectiveness of our tanks and tank destroyers on the battlefield  Had he died a year earlier we would have gone ashore in Europe equipped with  T tanks and possibly even some mm Shermans  It would have made a difference