Before he was President, Eisenhower was a general. What war was he in?

Why this is the answer

World War II. Dwight D. Eisenhower made his name in the Second World War, where he served as a general, commanded U.S. forces and became supreme commander of the Allies in Europe. In that role he led the D-Day invasion of Normandy, France, on June 6, 1944, and by May 1945 Europe had been freed from German control. His path from the army to the White House was quick. He retired from active military service in 1952, won the presidential election later that year and took office in 1953 as the 34th president. He served two terms and left in 1961. What came after is what makes this question tricky. His presidency overlapped with two other conflicts, and both make tempting wrong answers. The Korean War began in 1950 when the North Korean army crossed the 38th parallel into South Korea, and the fighting ended in 1953. Eisenhower oversaw that ending, but as president, not as a general in the field. The Cold War also shaped his years in office: the United States and the Soviet Union built large armies in case they went to war, and in 1957 the Soviets became the first country to send a satellite into space. None of that was combat he led in uniform. The question asks about the time before he was president, and the clue sits in its first words. At home, his presidency is remembered for the interstate highway system and for the creation in 1953 of the Department of Health, Education, and Welfare, known today as Health and Human Services. To lock in the answer, tie him to a single date, June 6, 1944. A general who led D-Day can only have fought in World War II. There is a bonus, too: question 78 asks you to name a war the United States fought in the 1900s, and World War II is accepted there as well, so this one fact pays off twice.