The Army of Alsace (French: Armée d'Alsace) was a French field army of the First World War that operated from 11 to 28 August 1914.
See also: Battle of Mulhouse.
On 7 August 1914, the French VII Corps (General Bonneau) captured Mulhouse but were forced out three days later by German counter-attacks. Bonneau was dismissed by Joffre and the VII Corps was expanded, becoming the French: Armée d'Alsace under command of Paul Pau.
The reinforcements were
A new attack was launched, Mulhouse was taken and the Germans were even pushed over the Rhine. French defeats in Lorraine and the Ardennes forced the French: Armée d'Alsace to withdraw from Mulhouse, to a more defensible line near Altkirch and to provide reinforcements for the French armies closer to Paris.
The army was disbanded on 28 August and many of its units distributed among the remaining French armies. The units that remained in Southern Alsace, came under the First Army and received the name of French: Groupement des Vosges, which became the XXXIV Corps on 22 October 1914. On 8 December 1914, with the stabilisation of the Western Front, more units were added to this sector and they formed the independent French: détachement d'Armée des Vosges/détachement d'Armée Putz under General Henri Putz. On 4 April 1915, the force became the Seventh Army.