Would the Shepherds fold your favorite route?

**Conditions: — Both parties are at their endgame, both in abilities and lore.

— One side wins when they control the other; either by forcing a surrender or defeating the leader

— Special mechanics are considered canon. Fodlan has to deal with things like the weapon triangle and Pairing Up, etc; while Ylisse: Rewinds, Battallions, and etc.**

Lets say that, hypothetically, Ylisse and her neighbors discovered Fodlan and somehow began to clash with each other. Accounting for both countries' way of life and their warriors, what would the outcome be? I say "your favorite route" since unfortunately there isn't one where everyone is alive and well (plus every character would just overwhelm the Shepherds lol)