Fire Emblem: Three Houses - Chapter 12 – To War Story Walkthrough

A story walkthrough for Chapter 12 - To War in Fire Emblem: Three Houses, including a strategy guide for the mission battle The Battle of Garreg Mach.

Fire Emblem: Three Houses - Walkthrough and Strategy Guide

Chapter 12: To War


BylethByleth RheaRhea
Seteth EdelgardEdelgard

Character List

Walkthrough: Garreg Mach (Month of Lone Moon)

1 Talk to Rhea and Seteth.
2 Do all unfinished side missions and equip your units with the best equipment you can before proceeding to Day 31.
3 Finish “The Battle of Garreg Mach” main mission

Mission Battle: The Battle of Garreg Mach

Battle Objectives

Victory Condition Defeat the enemy commander.
Defeat Condition All your units fall in battle, Rhea falls in battle, or the defended location is captured.

Edelgard Story Route Units

Player Unit Battalion Used
Fire Emblem: Three Houses - Shamir IconShamir

Ally Units

Ally Unit Battalion Used
Church Soldier x7

Enemy Units

Enemy Unit Battalion Used
Enemy Commander
Winged Demonic Beast x2
Death Knight
Imperial Soldiers

Obtainable Items

Item Location
? ?

The Battle of Garreg Mach Strategy

1) Defeat the Winged Demonic Beast First

to war

The beast in the lower-left corner can prevent your units from advancing toward the enemy commander since it can fly almost anywhere around the map. Defeat this creature quickly using your best heavy hitters.

2) Defeating the Death Knight

While most of the enemies are easy to deal with, as long as you have high unit levels accomplished by finishing side missions, the Death Knight located to the west is tanky and can be quite difficult to stop once he advances towards Rhea. Units with high attack power like Seteth can defeat the knight in two or three turns. Make sure you have a healer with you to avoid losing a unit to it. Alternatively, if you can get to the commander and defeat it quickly, you don’t have to deal with this menacing enemy.

3) Dealing with the Commander

Defeating the enemy commander is not an easy task. Since she has a lot of ally units surrounding her, it is best to take them out first using units that can deal high damage. Take advantage of these units’ weaknesses, the flying enemies can be countered using archers, while units with heavy armor can be easily defeated by magic users.

While the commander has a very high attack power and can deal damage from a distance, she has a lower chance of landing a hit due to her low speed. Take advantage of this weakness by pitting her against units that have high speed stats to avoid her attacks.

← Chapter 11: Throne of Knowledge Chapter 13: Reunion at Dawn →

Other Walkthroughs

Character, Classes, and Crests
Character Base Stats Character Base Skill Levels Class Base Stats
Character Stat Growth Rates Class Stat Growth Rates Skill Level Experience Bonuses
Tutoring Strengths Crests
Equipment and Items
Weapons Shields Accessories
Hero's Relic & Sacred Weapons Items Merchant Shop Items
Pagan Altar Items - -
Abilities, Arts, and Skills
Combat Arts Spells Class Combat Arts
Class Abilities Learned Combat Arts Learned Spells
Learned Authority Abilities Personal Abilities Gambits
Battles, Quests, and Locations
Monastery Map Abyss Map Mission Battles
Paralogue Battles Auxiliary Battles Quest Battles
Quests Terrains -
Enemy Units and Monsters
Enemy Units Monsters Maddening Enemy Unit Skills
Monster Attacks and Skills - -

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