In 869, Lothair II of Lotharingia died without any legitimate children but instead of the Kingdom passing to his brother Louis II of Italy, The Kingdom was divided between his uncles Louis II "the German" of Germany and Charles II "the Bald" of France. In 876 Louis the German died and his Kingdoms were divided between his sons Carloman, Louis and Charles. Louis inherited Saxony and Eastern Lotharingia. Charles the Bald tried to take the Eastern Parts of Lotharingia, but was defeated by the new king. In 878, Louis the Stammerer and Louis the Younger agreed to respect each others sons succession, but when Louis the Stammerer died the next year, Joscelin the Abbot invited Louis to succeed his cousin and Liutgard, Louis' wife also wanted him to invade, he went as far as Verdun but Louis III and Carloman II of France ceded Western Lotharingia to Louis the Younger, who then retreated. But what if he decided to take France anyway and then won? Assuming Louis still dies without an heir, he would be succeeded by his brother Charles the Fat, who would've reunited the Carolingian Empire 2 years earlier. How would this affect the Capetians and Ottonians? Would Charles be able to consolidate his rule over France or would he still be overthrown?