Even more damningly , Carl Goerdeler , the main civilian leader of the Resistance , wrote on several letters and other documents that Rommel was a potential supporter and an acceptable military leader to be placed in a position of responsibility should their coup succeed . Additionally , Carl Goerdeler , the main civilian leader of the Resistance , wrote on several letters and other documents that Rommel was a potential supporter and an acceptable military leader to be placed in a position of responsibility should their coup succeed .