Can you beat Fire Emblem Three Houses without committing a war crime?

I fell into a river and have been asleep for the last five years, but worry not, I’ve now returned to end all Three Houses discourse once and for all.

Music used:
/”Boots on the Ground/” from Fire Emblem Warriors: Three Hopes
/”Fódlan Winds [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Colorless World/” from Fire Emblem Warriors: Three Hopes
/”The Long Road [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Blood and Iron [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”The Verge of Death [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Between Heaven and Earth [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”The Ashen Demon [Embers]/” from Fire Emblem Warriors: Three Hopes
/”Abyss [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”The Ashen Demon [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”The Ashen Demon [Finale]/” from Fire Emblem Warriors: Three Hopes
/”Holy Ground [Embers]/” from Fire Emblem Warriors: Three Hopes
/”Tearing Through Heaven [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Outskirt Stand/” from Pokémon Colosseum
/”Roar of Dominion [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Chasing Daybreak [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Paths That Will Never Cross [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Darkness [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Slay or Be Slain [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Like a Flash of Lightning [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Funeral of Flowers (Part I) [Inferno]/” from Fire Emblem Warriors: Three Hopes
/”Melody of Clarity (Part II) [Inferno]/” from Fire Emblem Warriors: Three Hopes