In the first of a two-part series, historian Dan Snow examines how two years of meticulous planning, espionage and the analysis of millions of three-dimensional aerial photographs helped the Allied Forces gain a foothold in northern France.
The concluding part of historian Dan Snow's documentary series tells the powerful and heroic stories of those who risked their lives on the beaches of Normandy, to save the world from Nazi Germany.
In this compilation of films made for schools, Dan Snow uncovers the story of D-Day.
