The collapse of the French army in 1940 is a well-researched topic in Second World War Studies but a surprising gap in the historiography emerges when it comes to the study of the French military prior to the German offensive of May 1940.Using various public and private sources in different languages, this book aims to address this gap by studying morale on the frontline and its management by the French Government, the Grand Quartier Général, at the scale of the regiment and on a personal level. This research also investigates German and British propaganda in French and aimed at the French sector of the frontline in order to offer the first comprehensive comparative study of French army morale in any language.