 Henry obtained absolution at Canossa in January 1077 and Burchard, who accompanied him on the penitential pilgrimage, was reinstated in office.During the civil war that began in 1077 between Henry and his rival Duke Rudolf of Rheinfelden—who was raised to the throne by many princes—Burchard sided with Henry and fought in the king's interests repeatedly, both against Rudolf and his supporter Berthold of Zahringen.In 1078 Burchard and Henry suffered a crushing defeat; Burchard had to flee rapidly to save his life.