Various, Encyclopaedia Britannica, 11th Edition…
“ In 980, regretting his fruitless quarrel with Otto II., who had ravaged the whole country as far as Paris, and fearing that even with the support of the house of Vermandois he would be crushed like his father Louis IV. between the duke of France and the emperor, who could count on the archbishop of Reims, Lothair made peace with Otto—a great mistake, which cost him the prestige he had gained among his nobles by his fairly successful struggle with the emperor, drawing down upon him, moreover, the swift wrath of Hugh, who thought himself tricked. ”
