I didn't say any transferred country was destroyed, I said only Atlantis was destroyed after Mu was transferred
If I do a quick google search on Atlantis, the greek who first wrote about it, said it existed somewhere around 9600 BC, and we all know everyone was still using stone tools at that time, so if you're saying the civilizations that existed during the Mu-Atlantis cold war crumbled from a sudden change of the Earth axis and some climate changes, then yes, I do agree that then yes the "Civilizations" in China and Korea got destroyed, but not that China and Korea got destroyed, because then it makes me think of the regions and not the civilization, and those places didn't get covered in snow, because at that time the world was warming, and it's only said that Atlantis rolled the 1 and got eternal winter
And again, with the Wiki, it's said that Mu lost chunks of territory after it was transferred because they couldn't use magic, so I would guess that Mu (and Atlantis) were actually around the bronze or iron age when everyone else was using rocks, so maybe, just maybe the disappearance of Mu was actually what caused the Bronze age collapse
Though if I had to say, which is the truly weakest, I would bet on the HME, why? Because they're only strong because they just happened to be sitting on top of a bunch of ancient powerful relics that they just copied, and didn't do anything more to improve, while Mu is trying its best to catch up to Japan ASAP
for Mu is the weakest because of the comparison with the HME, Japan, GVE and the dragon kingdom, then yes it looks weak, but if you look another way, both the HME and Mu are weak against Japan and GVE by a lot, with Mu being the only "original" superpower to be doing everything it can to strengthen itself with the help of Japan, making it the third, after they defeat the GVE, because second is the Annorial Empire that is probably either equal if not stronger than the HME