This speech came up in a recent discussion. While the NPR article https://www.npr.org/2013/06/08/189535104/the-speech-eisenhower-never-gave-on-the-normandy-invasion is a few years old, I remember hearing about the speech a long time ago. This was the speech planned by Eisenhower if the Normandy invasion failed. I don’t recall if I saw it at the Eisenhower Presidential Library or read about it first online.
“Our landings in the Cherbourg-Havre area have failed to gain a satisfactory foothold and I have withdrawn the troops,” Eisenhower wrote. “My decision to attack at this time and place was based upon the best information available. The troops, the air and the Navy did all that bravery and devotion to duty could do. If any blame or fault attaches to the attempt it is mine alone.”
Having a back plan in a case like this is a wise move. I appreciate that he was willing to take the sole blame if the invasion failed.