The territory chosen by Ikaris was located over 26,000 kilometers southwest of Tartarus Shade. Albeit more to the west than to the south. So far, nothing to worry about.
The Warring Lands teemed with large lakes as big as small seas, as well as rivers so wide that when standing on one shore it could be difficult at times to discern the mountain ranges looming at the other. Most of them were connected to each other forming an uninterrupted network covering almost every land.
Needless to say, with such vast lakes, the presence of islands and peninsulas huge enough to support the rise of a country was not uncommon either, and these were usually the preferred choices of new Lords. Tartarus Shade itself was built on a gigantic island and the fact that it could only be reached directly by water made it all the more difficult to besiege.