Fire Emblem: Three Houses - Chapter 15 – Valley of Torment Story Walkthrough

A story walkthrough for Chapter 15 - Valley of Torment in Fire Emblem: Three Houses, including a strategy guide for the mission battle, Ambush at Ailell.

Fire Emblem: Three Houses - Walkthrough and Strategy Guide

Chapter 15: Valley of Torment


BylethByleth Seteth

Character List

Walkthrough: Garreg Mach (Pegasus Moon)

1 Talk to Seteth and Flayn.
2 Finish seminars and side missions before reaching the last day of the month.
3 Do the “Ambush at Ailell” main mission.
4 Choose “It’s an enemy raid” and “We must break through” for the conversation choices.

Mission Battle: Ambush at Ailell

Battle Objectives

Victory Condition Defeat the enemy commander.
Defeat Condition All of your units fall in battle, or Judith is defeated.

Edelgard Story Route Units

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

Claude Story Route Player Units

Ally Unit Battalion Used

Ally Units

Ally Unit Battalion Used
Alliance Soldiers (Armored Knight)

Enemy Units

Enemy Unit Battalion Used
Kingdom Soldiers (Armored Knight)
Kingdom Soldiers (Paladin)
Kingdom Soldiers (Sniper)
Kingdom Soldiers (Fortress)
Kingdom Soldiers (Bishop)

Obtainable Items

Item Location
Concoction Drop from one of the Imperial Soldiers (Paladin)

Ambush at Ailell Strategy

1) Advance towards Gwendal

Valley of Torment

Due to the lava floor located in different parts of the map, it is quite difficult for your ground-type units to maneuver. It is recommended that you have at least two or three flying units in your party in order to get to Gwendal faster. However, there are a few enemy sniper units on the battlefield, so have your cavalry with terrain resistance eliminate these units before they can attack your flying allies.

Near the end of the battle, Judith will appear in the top right corner of the map. This corner, while accessible, is quite far from the location of Gwendal. It is best that you defeat Gwendal as fast as possible using Seteth or Byleth before the enemies can take out Judith.

← Chapter 14: A King Without a Kingdom Chapter 16: The Rose-Colored River →

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 - -

Fire Emblem: Three Houses Recommended Article List

▼Top Page Articles
Walkthroughs Characters Classes
Beginner Guides Strategy Guides Game Database
Best Characters Best Classes Professor Levels
Dialogue Choices Lecture Room Advice Box
Tea Party Topics Favorite Gifts Lost Items
▼Popular Guides
Recommended Classes Tea Party Topics Lysithea Tea Party Guide
Ingrid Tea Party Guide Marianne Tea Party Guide Dorothea Tea Party Guide
Claude Tea Party Guide Hilda Tea Party Guide Petra Tea Party Guide
 Shamir Tea Party Guide Dancer Class List of Characters
▼Popular Tea Party Guides
Lysithea von Ordelia Ingrid Brandol Galatea Marianne von Edmund
Dorothea Arnault Claude von Riegan Hilda Valentine Goneril
Petra Macneary Shamir Nevrand Flayn
Felix Fraldarius Bernadetta von Varley Leonie Pinelli

Leave a Reply


  1. I was wondering where Ashe went. I recruited him and had B support level. After the 5 year skip he was nowhere to be found… I though he couldn’t be recruited or something. I’ll make sure to defeat him with the Mc.

  2. I’m playing the Black Eagles route but I’ve wanted to recruit Ashe since the beginning of the game. Is there any way to recruit him or you have to kill him?

    • As far as I can tell, there’s is no new recruiting once you get to part two. There are some characters that if you recruited them in part one, they still come back as an enemy in part two, but once you beat them if gives you a choice to recruit them, but most just come back immediately once you start part two. In my golden deer play through I tried to get just about everyone of my units to talk to Ashe, but none could, and I eventually pinned him against a wall so he couldn’t really attack my units and I didn’t kill him, hoping if I ended the map with him still alive I could recruit him after, but he still disappeared after just like if I had killed him.

      • If you want to save Ashe, it only works if you recruited him during the school phase then with Byleth (mc) defeat him then it’ll allow you to persuade him into rejoining same with other units

    • If you recruited him during school phase beat him with mc (Byleth) and you should be able to persuade him into rejoining