How did the Romans govern the southern part of Bavaria?

Following their conquest of the region around the beginning of the Common Era, the Romans governed the southern part of present-day Bavaria by dividing it into the provinces of Raetia and Noricum.1

To secure the territory, the Romans constructed fortifications along the northern boundary as a defensive measure against Germanic tribes. The province of Raetia, in particular, served as a strategic frontier that controlled vital highway networks between Italy, the Danube River, Gaul, and the Balkan Mountains. Within this region, the Romans established several flourishing colonies, including Augsburg, Kempten, Regensburg, and Passau. Roman control over these areas persisted until the 5th century, when the empire was overcome by repeated Germanic attacks.12