5th Army (France)The Fifth Army was a field army of the French Army that fought during World War I and World War II.World War IOn 29 August 1914 the 5th Army under Lanrezac won a partial victory at the battle of Guise, delaying the German attack. However, Lanrezac was replaced by Louis Franchet d'Espèrey on 3 September 1914. Under its new commander, it participated in the victory at the First Battle of the Marne.World War IIDuring the Battle of France in 1940, the Fifth Army was part of the Second Army Group. It was responsible for the defense of the Maginot Line sector in Lower Alsace, from the Rhine to the Vosges mountains.Order of Battle (10 May 1940)At the start of the German offensive, the Fifth Army was commanded by Général d'armée Victor Bourret. Its headquarters was located at Wangenbourg.Army Assets (Organiques d'Armée)VIII Army Corps (8e Corps d'Armée)XII Army Corps (12e Corps d'Armée)XVII Army Corps (17e Corps d'Armée)43rd Fortress Army Corps (43e Corps d'Armée de Forteresse)