As a result of the Second Crusade, in addition to a large amount of spoils, there was also a treaty, which of course would not be a treaty between the countries of the Light Doctrine and the countries of the Dark Doctrine, and now there is no common language between them. This Treaty of Sisgang was signed between the Violet Empire and the Fia Empire under the auspices of the Holy See.

While the armies of the Violet Empire, the Fia Empire, and the Holy See swept across the Coconut Wind Plain, the armies of the two empires fought for the spoils of war and the colonies. Although the conflict was quelled by the Holy See's strong persuasion, the hidden danger of the matter was already revealed, after all, the two empires wanted more benefits. It seems that it is necessary to distribute the interests of both sides, otherwise the country of the Light Doctrine will fight first, and I am afraid it will be difficult to achieve the purpose of the holy war.

Under the leadership of the cardinals representing the Holy See, the representatives of the two empires agreed to draw a 45-degree dividing line to the northeast centered on the city of Sisgang in the southwest corner of the Coconut Wind Plain, which divided the Coconut Wind Plain and the entire Grecian continent into two sections, with the Fia Empire's sphere of influence in the southeast and the Violet Empire in the northwest. The Knights of Light of the Holy See have the right to crusade against infidels anywhere, provided that they do not conflict with the objectives of the Imperial army.

This became known as the Treaty of Sisgang, which was accepted by the Emperors and Pope of the two countries after the expeditionary force returned to Atlantus, and the two empires on Atlante were able to maintain a period of peace for another thirty years.

Holy See's holy war is still waged every few years, and the iron horsemen of Atlantus ravage the Coconut Plains and the deeper and farther hinterlands of the continent over and over again. Colonies were established on the fertile plains, and a large number of surplus landless Atlantans were relocated to the coconut plains, where they cultivated cloves, cinnamon, pepper and other spices, mined, and dived pearls, while merchants brought all kinds of raw materials and products back to Atlantus in huge transport ships, and then brought tools, daily necessities, and various manufactured goods needed in the New World. Trade quickly spread between the Coconut Wind Plain and the two continents, and maritime trade became the most lucrative industry.

After decades of unremitting exploration, the Atlantans gradually discovered the geography of the Grecian continent. After the expedition passed, armies, missionaries, immigrants, and merchants followed, expanding from south to north and west to east.

It took the Atlantans a full hundred years to barely conquer the region of Siglesia. Of course, only barely, very reluctantly, many areas were still forbidden places for the Atlantans for a long time, and in those areas with complex terrain, barbarians and orcs and many strange creatures have been tenaciously surviving.