The section details the fate of the realm long fabled in Europe as "Prester John," which is accurately known as the Kingdom of Sion in the Horn of Africa. Contrary to European legend, Sion is not a land of immense wealth but remains one of Africa's most formidable states, primarily due to its army of highly disciplined warriors known as "Sion Knights," whose prowess is feared even by Madjrit. Despite its military strength, Sion faces a persistent threat from its Islamic neighbor, the Egyptian Sultanate, which receives significant financial backing from Madjrit. In the mid-16th century, the Egyptians initiated a systematic campaign against Sion, supported by various Arab kingdoms and tribes, successfully tearing through Sion's defenses. However, Sion dramatically rallied in 1567, halting a combined Egyptian-Arab force at Aksum and forcing them back to the frontier. This conflict entered a protracted, intermittent phase, with neither side gaining a definitive advantage, while the Persians covertly supported both realms—Sion on religious grounds and Egypt to weaken its rival—allowing them to profit from the perpetual chaos and bloodletting.

The Empire of Rhomania (Eastern Rome), having observed this predicament for decades, finally intervened in 1617, citing continuous friction with the Egyptians on their own northern frontier. Rome launched an invasion of the Levant, an Egyptian stronghold, primarily to distract the enemy. This diversion allowed Sion to seize the moment, pushing back the Egyptians and advancing up the Nile between 1618 and 1620. This Christian resurgence was abruptly halted in 1621, not by Egyptian forces, but by Madjriti troops who had been dispatched to support their Muslim co-religionists, escalating the conflict into an "intra-regional" war between Christianity and Islam.

Years of protracted and ruinous fighting ensued across the Egyptian, Anatolian, and Syrian frontiers, as well as the Mediterranean, until all parties sought an end to the costly conflagration. The war concluded with the signing of the Treaty of Cairo in 1627, which largely reestablished the existing status quo. The sources conclude that despite the massive interventions by the Eastern Romans and the Madjritis, the original tensions between Egypt and Sion remain unresolved decades later, guaranteeing that conflict in the region is inevitable as long as both considerably strong realms persist.