General Patton was angered and revolted by what he saw at the Nazi concentration camp. Here's What You Need to Remember: American officers tried to determine the exact number of persons who died during Buchenwald’s nearly eight years of operation, but it was no easy task. The blue arrows on Lt. Gen. George S. Patton, Jr.’s Third Army situation maps in his mobile headquarters trailer all pointed eastward. From the vicinity of Frankfurt-am-Main, Patton’s three corps—Troy Middleton’s VIII, Manton Eddy’s XII, and Maj. Gen. Walton H. Walker’s XX—were plunging side by side over hills, across rivers, streams, and fields, through woods, and into towns and villages, through barricades, road blocks, and minefields, destroying all efforts by the Germans to slow the advance. This was all before the true horrors of the Nazi regime were known to Allied forces. Patton’s army had yet to learn of the atrocities that were taking place at Ohrdruf and the Buchenwald Concentration Camp. But that day was fast approaching.