At the beginning of the third phase, since April 5, the CC2 was in Germany. Combat engaged with the 9th Colonial Infantry Division, the path throughout the Forêt-Noire was cleared, to deliver to the 1st Army the important routes. Later to the turn, the CC3 combat engaged supporting the colonials. Following a march on Kehl and Offenburg, they made way south to apprehend Fribourg on April 21. They rejoined the division on the 28 south-west of Ulm. The 1st Armored Division crossed the Rhin on April 17. Général Sudre regrouped means at the exception of CC3 around Freudenstadt, and while acting with the cadre of the 1st Army Corps, his unit mounted the assault. The division accordingly made way to Danube by Rottweil and Horb, crossed the river on April 21 at Matulheim and Tuttlingen, and while engaging Stockach, pushed back all along the Danube by Sigmaringen until Ulm which was apprehended in liaison with the American 7th U.S. Army arriving from the North. The 1re DB apprehended Immenstadt on April 30 and reached the same day the Austrian frontier to occupy Aach and Oberstdorf. With only the field of mountains in plain sight, the division opened the way for the infantry and regrouped around de Biberach. First in the Rhin, first in Danube, the division with the Cross of Saint-Louis reached objectives following a sequence of successful event combat engagement series. The division played a decisive role towards the final campaign. The CC2 in Forêt-Noire, the CC3 in the fields of Bade, then the entire division engaged in combat until May 7.