S1, E4: After Surviving The Freezing Winter Of 1916 The British Attacked The Germans At Arras The Battle That Followed Saw The Highest Daily Casualty Rate Of The War In The Summer The British Advanced Towards The Village Of Passchendaele In The Most Dreadful Conditions Countless Numbers Drowned In Mud In The Battle That Remains Synonymous With The Horror Of Mechanized Warfare