At the time, the youngest of men would have been around 16 years old, now they are in their 90s.
In a special documentary to mark the 75th anniversary of D-Day, Forces TV met with nine Normandy landings veterans, including Elsie Plummer who was one of the few women to cross the channel in June 1944.
"I can remember it just as if it was yesterday," she said.
Bill Glen, who served in the Highland Light Infantry Regiment, recalled the fear he felt when he was called to serve in the Normandy landings, saying:
"I lied in bed and physically cried because I didn't know what was going to happen to me."
Elsie Plummer, one of the few women to travel across the channel, described the moment she was called upon: "The officer of the unit sent for me, he said: 'We're very short of men so escort some of these tanks over the channel into Normandy and come back again'."
She was serving as a Sergeant at the time, working on Armoured Fighting Vehicles.
She was given just an hour's notice before she had to cross the channel.