This is the battle walkthrough for the mission Taking Fort Merceus from Fire Emblem: Three Houses (FETH, FE3H). Read on to find out about map features, what enemies you will encounter, and tips for winning!

Previous Battle	Story Walkthrough	Next Battle
Chapter 16: The Great Bridge Coup	Chapter 17: The Impregnable Fortress	Chapter 18: The Enbarr Infiltration

Chapter 17 (Church) - Map and Overview

Victory Conditions
Defeat the enemy commander.
Defeat Conditions
Byleth falls in battle.
# of Player Units	10
# of Enemies	37

Chapter 17 (Church) - Enemies

A	Demon Beasts	B	Imperial Soldier (Paladin)
C	Imperial Soldier (Fortress Knight))	D	Imperial Soldier (Dark Mage)
E	Imperial Soldier (Archer)	F	Imperial Soldier (Warrior)
G	Imperial Soldier (Bishop)	H	Imperial Soldier (Dark Bishop)
I	Imperial Soldier (Sword Master)	J	Imperial Soldier (Assassin)
K	Death Knight	-	-

Death Knight

Level	45	HP	61	Movement	-
Class		Death Knight
Attack		Hit Rate		Critical Hit
57		132		49
Attack Speed	34	Protection	34	Resilience	28
Avoidance	59	Range		1
Weapon	Scythe of Sariel		Dropped Item	Dark Seal
Battalion	Reaper Knights			Level	4
Endurance	75	Gambit	Assault Troop	Uses	2

Chapter 17 (Church) - Chests

Speedwing (A)

A Speedwing can be obtained from the chest near the starting point of your units.

Aurora Shield (B)

An Aurora Shield can be obtained from the chest located on the far north side of the map.

Chapter 17 (Church) - Map Features

Tiles

Tiles	Description
Rampart	Navigable only by fliers
Stairs	Difficult for cavalry to travers
Fire Orb	5 Mt, 15 Durability, 3-12 Rng, Can only be used by Magic Classes
Ballista	5 Mt, 15 Durability, 3-12 Rng, Requires Bow Skill of D or higher
Heal Tile+	1 Prt, 1 Res, +30% HP each turn for non-fliers

Reinforcement Tiles

There are tiles on the battlefield that can be stepped on to stop the influx of enemy units from entering the fray. You can leave the tile after stepping on it and the enemies still won't respawn.

Escape Route

The Death Knight will start escaping during the battle. You must defeat the Death Knight the moment you reach him.

Chapter 17 (Church) - Tips and Tricks

Deploy a High Mobility Unit to Get Chests

Deploying a fast unit can minimize the time spent obtaining the chest. Prolonging the fight will cause enemies to swarm your team so time is of the essence.

Capture and Leave Respawn Tiles

You only need to step on the respawn tiles to make enemies stop from respawning. No need to make your units stay and make them help in the battle!

Bring a Unit with Knightkneeler

The Death Knight dropping a Dark Seal after its death.

Your units should be strong enough to survive an attack from the Death Knight but that doesn't mean the Death Knight is now an easy foe. Defeating him immediately is a must and the Knightkneeler Combat Art does this right.

Fire Emblem: Three Houses - Related Links

Part 2 - Silver Snow Battle Walkthroughs

Part 2 - Silver Snow
Chapter 13: Hunting at Daybreak	Chapter 14: Protecting Garreg Mach	Chapter 15: Ambush at Ailell
Chapter 16: The Great Bridge Coup	Chapter 17: Taking Fort Merceus	Chapter 18: The Enbarr Infiltration
Chapter 19: Confrontation at the Palace	Chapter 20: Stand Strong at Shambhala	Chapter 21: The Final Battle