On this day in 1944, more than 150,000 Allied troops stormed the beaches of Normandy in an operation that, as President Obama said during the 70th anniversary in 2014, "In the annals of history, the world had never seen anything like it."
Operation Overlord was the largest seaborne invasion in military history and proved critical to the eventual defeat of the Third Reich.
Soldiers in the operation made up six divisions -- three American, two British and one Canadian.
Here, army troops are shown on board a transport ship, ready to ride across the English Channel to France. Some of the men wear 101st Airborne Division insignia. As part of the Operation Overlord battle plan, three divisions of paratroopers (two American, one British) had already been dropped inland the night before the invasion.