Dwight D. Eisenhower got elected president because of his performance as General Eisenhower in World War II, specifically on D-Day's invasion of France in 1944. The years of his presidency were served in a mostly peace oriented time for the United States, so one can say he'd already completed the highlight of his career.
Operation Overlord also known as the D-Day invasion of France in 1944 is considered one of the best planned and executed offensives in all of military history. Eisenhower coordinated this invasion masterfully along with military officers from other allied countries. He overcame many obstacles in planning the attack and managed to totally fool the Germans into thinking the attack was coming at a different location. Without Eisenhower's efforts the Axis might have won World War II and the world would be a very different place today.
Even though he would go on to hold other offices for much longer, his career peak could have arguably been on D-Day because of the significance of that day and the importance of it to many people around the world as it marked a milestone in the Second World War.
Yes, the allied invasion of France on D-Day in 1994 was the peak of General Eisenhower's career, because it set the stage for everything that came after it. On D-Day, Eisenhower showed his brilliance as a military general. That day gave him the respect that set the stage for his presidential election.
The D-Day invasion was a triumph for General Eisenhower and
the allied armies, but serving as President of the United States was the peak
of his career. As a general, Eisenhower led the forces that defeated Hitler and
brought peace. As president, Eisenhower pushed forward racial integration in
the military, built the American interstate highway system, and worked harmoniously
with a Congress in which the majority of members were not of his party. His was
an amazing presidency.