[quote=@Nucleep]
<Snipped quote by Dinh AaronMk>

Three words: extremely limited resources.

(Also, you may not have noticed but Lanist Khaganate is also a interdimensional nation. Plus I'm not even actually here to conquer anyone for at least a few hundred years IC, but more like the role of the European nations in India pre-British Raj)
[/quote]

Extreme limited resources doesn't really count for a country that can send anyone to any other dimension. This implies a long line of technological development and support for them that puts the entire state at an incredibly, unimaginable advantage over anyone else. There is no limitation in resources when you can peel back the differences between inter-dimensional reality to enter others at will. It's not the difference between British dudes with muskets fighting Indians with bows, it's people with assault rifles fighting people throwing mud.