On 1 August 1943, was formally united with the Free French Forces to form the French Liberation Army. By mid-1944, the forces of this army numbered more than 400,000, and they participated in the Normandy landings and the invasion of southern France, eventually leading the drive on Paris. Soon they were fighting in Alsace, the Alps and Brittany. By the end of the war, they were 1,300,000 strong—the fourth-largest Allied army in Europe—and took part in the Allied advance through France and invasion of Germany. The Free French government re-established a provisional republic after the liberation, preparing the ground for the Fourth Republic in 1946.