The First Army (French: 1re Armée) was a field army of France that fought during World War I and World War II. It was also active during the Cold War.
On mobilization in August 1914 the First Army was put in the charge of General Auguste Dubail and comprised the 7th, 8th, 13th, 14th, and 21st Army Corps, two divisions of cavalry and one reserve infantry division. It was massed between Belfort and the general line Mirecourt-Lunéville with headquarters at Epinal. First Army then took part, along with the French Second Army, in the Invasion of Lorraine. The First Army intended to take the strongly defended town of Sarrebourg. German Crown Prince Rupprecht, commander of the German Sixth Army, was tasked with stopping the French invasion. The French attack was repulsed by Rupprecht and his stratagem of pretending to retreat and then strongly attacking back. On August 20, Rupprecht launched a major counter-offensive, driving the French armies out. Dubail was replaced in 1915. A frantic 1916 saw four different commanders command the First Army; an even more frantic 1917 saw five different commanders at the helm (including François Anthoine during the Battle of Passchendaele). By the time of the Passchendaele, the French First Army was composed of two corps - the 1st Army Corps (composed of 4 divisions) and the 36th Army Corps (composed of 2 divisions).
First Army may refer to:
The First Army was a field army of the Romanian Land Forces, active from 1916 to 2000.
The First Army took part in the Romanian actions during the First World War (see Romania during World War I).
Commanders were :
During Operation Munchen when Romania entered the Second World War in June–July 1941, the First Army was in the interior of Romania while the Third and Fourth Armies formed the main Romanian assault force. The First Army comprised at the time the 1st Army Corps (2nd, 11th, 30th, 31st IDs, 6th Army Corps and 7th Army Corps. (Romanian Artillery p. 117)
The First Army was created on 1 January 2015 in an effort to unify rebel ranks in southern Syria. Three prominent rebel units merged under this command structure. On 13 April 2015, it joined a number of other Southern Front affiliates in condemning al-Nusra's ideology and discontinuing all forms of cooperation with it.