Operation Overlord U.S. and POW/MIA flags fly at the National World War II Memorial in Washington, June 5, 2019. Volunteers read the names of nearly 9,000 American service members who were killed in France during Operation Overlord, which began June 6, 1944. SHARE: Download: Full Size (3.46 MB) Tags: Observances, World War II, D-Day, d-day 75 Credit: C. Todd Lopez, DOD VIRIN: 190605-D-NU123-001.JPG Photo Gallery