during the 1980s. After deactivation as the war headquarters for the NATO Central Army Group, Ouvrage Rochonvillers was designated as the First Army's war headquarters in the 1980s. In 1990 the army staff left Strasbourg and moved to the Château de Mercy in Mercy-lès-Metz, Moselle. The army's last commander was General Jean Cot. The 1st Army was disbanded on 31 August 1993. Commanders World War I General Auguste Dubail (Mobilisation – 5 January 1915) General Pierre Roques (5 January 1915 – 25 March 1916) General Olivier Mazel (25–31 March 1916) General Augustin Gérard (31 March – 31 December 1916) General Emile Fayolle (31 December 1916 – 6 May 1917) General Joseph Alfred Micheler (6 May – 1 June 1917) General Henri Gouraud (1–15 June 1917) General François Anthoine (15 June – 21 December 1917) General Marie-Eugène Debeney (21 December 1917 – Armistice) World War II General Georges Blanchard (2 September 1939 – 26 May 1940) General René Prioux (26–29 May 1940) General Jean de Lattre de Tassigny (September 1944 – 1 August 1945) See also List of French armies in World War I References External links BBC The fall of France to the Germans Duffy, Michael Iavarone, Mike Order of Battle on 10 May 1940 01 Field armies of France in World War I Military units and formations of France in World War II Military units and formations established in 1914 Military units and formations disestablished in the 1990s 1914 establishments in France