Board Thread:Manga/@comment-26624146-20180323160923/@comment-1327106-20180324060714

The biggest problem with that would likely be exactly what you're hoping for (and what the Warriors wouldn't want). In Shinganshina, the number of opposing soldiers is minimized. In Mitras, there would be enemies all over the place, and they would without a doubt be completely and utterly united. It would be be a nightmare for the Warriors to fight there.

Why the battle happens in Shiganshina is that it's the most strategically sound location for the Warriors. The Survey Corps must go there, which allows the Warriors to set up the battlefield to their advantage, which they do.