It is the early hours of June 6, 1944 – a heck of a day to be a soldier.
Airborne troops have either already parachuted over Normandy or will shortly be crash landing there in gliders.
They will be taking bridges and other objectives, ready for their comrades to follow by sea a few hours from now.
Everyone on the Allied side is hoping that all the preparations will work, and that now everything is going to come together.
In the words of US General Dwight D. Eisenhower: "You are about to embark upon the Great Crusade" and "The hopes and prayers of liberty-loving people everywhere march with you."
Follow our timeline below as we update dispatches, hour-by-hour, on the key decisive moments of D-Day - as the events of Operation Overlord would have unfolded on the day, June 6th, 1944 ...
(Note: This timeline is based on the book ‘D-Day: Minute by Minute’ by Jonathan Mayo. Pick up a copy from Shortbooks.co.uk to learn more about the events of June 5 and 6, 1944).
(Illustrations used here come from Airfix.co.uk and Ospreypublishing.com - read ‘D-Day Beach Assault Troops’ by Gordon L Rottman and ‘Pegasus Bridge’ by Will Fowler to learn more about some of the key events dipicted here).