On June 6th, 1944, 156,000 men took part in D-Day - the largest amphibious invasion in history. Its aim: to land in France and liberate Europe from 4 years of Nazi domination. In this series, the first 24 crucial hours of this incredible story is told - minute by minute - by the last surviving men who witnessed the horrors and victory unfold. Diaries and stories told by those left behind recount the personal experience of the men who were there on the day that not only changed their lives but changed the course of the second World War.