During the course of the second phase, the re DB was the first to penetrate Alsace and the first at Rhin. Making way on November 14 from the high valley of Doubs, the 1e DB mounted the offensive on Belfort. The division operating within the cadre of the 1st Army Corps (général Béthouart) slides along Héricourt along the French and Swiss border and apprehended Delle on November 18. The next day, the CC3 was in Alsace and, at 1800, the tank platoon of lieutenant Loisy was able to raise the fanion in the Rhin, at Rosenau. The latter was part of the 4th squadron of the 2nd African Chasseur Regiment. This officer would meet his end on the next November 23, when his tank was hit by an anti-tank launcher during the attack on caserne Lefebvre at Muhouse. On the 20, colonel Caldairou entered the city. Nevertheless, despite the success resulting from the junction of the 1st and 2nd Army Corps in the region of Burnhaupt, Colmar remained well protected. During two months, the division held in the snow a defensive sector on Dollar, south of that of what would be later referred to as the Colmar Pocket. On January 20, the 1st Army relaunched the assault on the two northern and southern flanks of the pocket, in the middle of a snow storm. Following a three-week struggle, Alsace was liberated and Colmar seized on February 2. The division, which engaged in combat since December 5 under the orders of général Sudre, following an annoying progression in between mines, witnessed a short exploitation which led to Chalampé on February 9 in the morning. Accordingly, the division finished the campaign of France started on August 15, 1944 and which was over six months later on the Rhin.