So, how are they making a living? Earth was supposed to be mostly an impoverished shithole after OYW, besides a few big cities, and that should be even more severe in this timeline where the fed lost. I dunno if they kept their MS's after the anime but even if they did I dont think clan battle would be a thing in the earth sphere both because of the economy and because MS operation and mainteance is way more expensive on earth than it would be on space due to gravity and weather. On top of that Machu is a known spacenoid criminal in a society that would likely still be holding a grudge against spacenoids so good luck finding a job as a school dropout