Army Group East (French: Groupe d'armées de l'Est, G. A. E.) was a grouping of French field armies during World War I, which was created on June 22, 1915 from the Groupe provisoire de l'Est (G. P. E.) which had been formed in January 1915. The army group covered the Western Front from the Swiss border to roughly east of Verdun.

• Général Augustin Dubail (July 1, 1915 – March 31, 1916)
• Général Louis Franchet d'Espèrey (March 31, 1916 – December 27, 1916)
• Général Édouard de Castelnau (December 27, 1916 – December 1918)

• The French Army and the First World War by Elizabeth Greenhalgh
• Philippe Pétain et Marc Ferro (Avant-propos), La Guerre mondiale : 1914–1918, Toulouse, Éditions Privat, 2014, 372 p. (ISBN 978-2-708-96961-2, OCLC 891408727)
• Victor Giraud, Histoire de la Grande Guerre, Paris, Librairie Hachette, 1920, 777 p.