You should really take a solid look at at Ike's screw-ups.
I hadn't even mentioned World War II.
He cut off Patton's gas supply and rejected Monty's plans to bring a quick end to the Third Reich as well.
Allowing Montgomery to drive into Germany from the north and Patton from the west could have ended the war in the fall of 1944 and saved countless lives.
Eisenhower wanted a broad front push, instead. This tactic allowed the bulk of the German army to retreat, an army that would later drive thru the Ardennes in December and delayed the end of the war for another six months.
