Henry I of France whose death Henry was left to deal with his rebel sibling. In 1032, he placated his brother by giving him the duchy of Burgundy which his father had given him in 1016. In an early strategic move, Henry came to the rescue of his very young nephew-in-law, the newly appointed Duke William of Normandy (who would go on to become William the Conqueror), to suppress a revolt by William's vassals. In 1047, Henry secured the dukedom for William in their decisive victory over the vassals at the Battle of Val-ès-Dunes near Caen; however, Henry would later support the barons against
William II, Duke of Brunswick-Lüneburg William II, Duke of Brunswick-Lüneburg William II, Duke of Brunswick-Lüneburg (about 1300 – 1369) was the Prince of Lüneburg from 1330 to 1369. William was born around the year 1300 as the fourth child of Otto the Strict and his wife, Matilda of Bavaria.<br> On his father's death, William took over the reins of state jointly with his brother Otto III. This was against his father's will because Otto II had wanted the state to be divided after his death. The focus of the brothers' reign in the early years was the territorial consolidation of the principality. For example, they