Principality of Lüneburg
In 1369, William II, the last Prince of Lüneburg died and Emperor Charles IV ruled that the Principality of Lüneburg was a completed fief and awarded it to Albert, who was a grandson of William II via his mother and a nephew of Rudolf II via his father. Duke Magnus II "Torquatus" of Brunswick-Wolfenbüttel disagreed with this outcome, which led to the Lüneburg War of Succession, which lasted long after Rudolf II's death.