The ten Sultanate countries held each other in check, so even if a few of them wanted to rebel, they would be confronted by the Great Sultan and the remaining Sultanates, who might even defeat them first to gain merit.
Similarly, if the Great Sultan had other ideas about Australasia, the surrounding ten Sultanates would also teach the Great Sultan a lesson.
In addition, with a certain degree of economic control and technological embargo, as long as they ensure that Kalimantan's technology never surpasses that of Australasia, Australasia's control over Kalimantan will be permanent.
This was also a great tree planted by Arthur for the monarchs of later generations. Judging from the land area of Kalimantan, the country had no problem accommodating a population of over a hundred million people.
A market with at least 100 million people, and one that could be exploited at will, was a huge boost to the development of Australasia.
