What was the codename for the overall Allied invasion of Normandy in 1944?

Operation Overlord

Operation Overlord was the massive military campaign that began on D-Day, June 6, 1944, involving over 150,000 Allied troops. While 'Neptune' specifically referred to the naval crossing, 'Overlord' encompassed the entire liberation strategy for Western Europe. It remains the largest seaborne invasion in history, requiring years of planning and elaborate deception tactics to succeed.