Jelačić's troops escaped the Surrender of Ulm and made it to the Vorarlberg near Lake Constance. Napoleon assigned Marshal Pierre Augereau and his 12,000-man corps to hunt down Jelačić. In a series of small actions, Augereau drove the Austrians steadily back and managed to split their forces apart. Jelačić surrendered to Augereau with his remaining 4,000 troops in the Capitulation of Dornbirn on 13 November. Under the terms of surrender, the Austrians were repatriated to Bohemia with the promise not to fight against France for one year. One thousand of his cavalry, under General-Major Christian Wolfskeel von Reichenberg and Colonels Wartensleben and Kinsky, made a remarkable march through Bavaria and reached Bohemia in safety. Another portion of the Vorarlberg force under Prince Viktor Rohan tried to reach Venice but was caught short of its goal. Rohan surrendered to Laurent Gouvion Saint-Cyr and Jean Reynier at Castelfranco Veneto. Jelačić soon retired from military service.