Louis's reign of 26 years was marked by numerous divisions of the empire among his sons and, after 829, civil wars between various alliances of father and sons over the control of various parts of the empire.
Hans 26 års regeringstid blev markeret af adskillige opdelinger af riget blandt hans sønner, og efter 829 borgerkrig mellem de forskellige alliancer mellem far og sønner over kontrollen af de forskellige dele af riget.