Now, 100 years later, Robert Kershaw attempts to understand the carnage, using the voices of the British and German soldiers who lived through that awful day. In the early hours of 1 July 1916, the British General staff placed its faith in patriotism and guts, believing that one 'Big Push' would bring on the end of the Great War.
Told over 24 hours, this is a definitive account of the iconic battle which took the lives of so many men and changed the course of history. 100 years on and Robert Kershaw attempts to understand that shocking day through the voices of the British and German soldiers who lived through it.