In 1627 he commanded the large forces assembled at the siege of La Rochelle; and some years after in 1635, during the Thirty Years' War, he was general of the French army in Lorraine.
The German populations of these lands seem in Roman times to have been scanty, and Roman subjects from the modern Alsace and Lorraine had drifted across the river eastwards.
In 939 Louis became involved in a struggle with the emperor Otto the Great on the question of Lorraine, the nobles of which district had sworn an oath of fidelity to the king of France.
When Louis married Gerberga, sister of Otto, and widow of Giselbert, duke of Lorraine, there seemed to be a The emperor Louis I.
Finally in 924 Lorraine passed in the reign of Henry the Fowler under German (East Frankish) overlordship. Henry's son, Otto the Great, owing to the disordered state of the country, placed it in 953 in the hands of his able brother, Bruno, archbishop of Cologne, for pacification.
