Dwight D. Eisenhower was the 34th President of the United States, serving from 1953 to 1961, and a five-star general in the U.S. Army during World War II. He played a crucial role in planning and executing the Allied invasion of Normandy, known as D-Day, which significantly contributed to the defeat of Nazi Germany. As president, he focused on Cold War tensions, particularly during the Korean War, and implemented policies that aimed at containing communism while promoting economic growth.