The Great Saxon Revolt is a civil war between 1077 and 1088 early in the history of the Holy Roman Empire led by a group of opportunistic German princes who elect as their figurehead the duke of Swabia and anti-king Rudolf of Rheinfeld, a two-way brother-in-law of the young Henry IV, Holy Roman Emperor (Henry had been crowned at the age of six and took on his offices when aged sixteen).
