While the two greatest powers of Catholic Christianity, the Quadruple Monarchy and France, were more interested in fighting each other, which culminated in the Great Occidental War, the Empire of the Rum-Seljuks was able to take most of Italy and invade deep into the HRE. This was their apogee, though; now the Triple Monarchy of England-Castille-Portugal came to sense and attacked them, defeating them in the Occidental-Seljuk War and liberating Rome. Still, the Seljuks held great parts of Italy and Hungary.