The Crystal Empire. A great kingdom, new in its birth, and unproven, but with much to gain if it moves fast. It holds enough troops to put up a great deal of resistance, especially when led by a stallion who has no moral obligations, and magic no other pony has ever used.
On the other side, we have Equestria. At peace for so long, and yet, still having a strong, standing army. Its length gives itself plenty of resources, but to cross such terrain takes time. Led by a powerful bureaucrat, and supposedly no sister, Celestia is a force few would wish to deal with, and many are inspired by.
Who wins when these two clash?
If anyone else thinks of Germany and Russia here, you know why I made this. I hope to look at all the ways Sombra could fail, or even perhaps, win. I have plenty of thoughts on the matter myself, but if you would like to suggest a way for this timeline to go for either side's favor, please, let me know, I will take it into consideration.
Thank you to RK_Striker and StardustSurvivor.