When Louis I died in 840, civil war erupted between Lothair, his brother LOUIS THE GERMAN, and Charles. Lothair was defeated by his brothers at the Battle of Fontenoy (841), and in 843 he concluded the Treaty of Verdun by which the Frankish empire was divided into three parts. Lothair received the Middle Kingdom as well as the imperial title. After dividing his kingdom among his three sons, Lothair entered the monastery of Prum in 855.
When Louis I died in 840, civil war erupted between Lothair, his brother LOUIS THE GERMAN, and Charles. Lothair was defeated by his brothers at the Battle of Fontenoy (841), and in 843 he concluded the Treaty of Verdun by which the Frankish empire was divided into three parts. Lothair received the Middle Kingdom as well as the imperial title. After dividing his kingdom among his three sons, Lothair entered the monastery of Prum in 855.