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To War

From Fire Emblem Wiki, your source on Fire Emblem information. By fans, for fans.
This article is about the chapter in Fire Emblem: Three Houses. For the chapters in Fire Emblem Warriors: Three Hopes, see To War! (Azure Gleam) and To War! (Golden Wildfire).
To War

Ss fe16 chapter 12 mural.png
Mural used to introduce the Lone Moon.

New units

Seteth; Catherine, Cyril, Hilda Black Eagles, if siding with the church

Previous chapter(s)

Throne of Knowledge

Next chapter(s)

Reunion at Dawn

Everybody here, young and old, is in your hands.
— Rhea

To War (Japanese: 戦乱の幕開け Opening of a War) is the twelfth chapter of Fire Emblem: Three Houses if Byleth was not a Black Eagle who sided with Edelgard in the previous chapter, and the final chapter of Part I.


Main articles: To War/Script (Church of Seiros), To War/Script (Blue Lions), and To War/Script (Golden Deer)

Shamir reports that Edelgard's forces are going to meet up with the main Imperial army and invade Garreg Mach Monastery in two week's time. Rhea orders Byleth to assume her duties if something should happen to her in the upcoming battle. Afterwards, Seteth demands that Rhea explain just what Byleth is, and Rhea reveals that Byleth is the vessel for the progenitor god and that they will eventually become one with the power within and resurrect said god. Two weeks pass, and the Adrestian army arrives with Edelgard at its head. A climactic battle ensues, and Byleth seemingly gets the upper hand against Edelgard, but she calls in reinforcements led by Lord Arundel. Rhea entrusts the safety of the Garreg Mach citizens to Byleth, declares that she will not allow a repeat of the Red Canyon tragedy, transforms into a colossal dragon, and decimates the Imperial forces. Several Demonic Beasts attack and put Rhea on the back foot, but Byleth reinforces her after they evacuate the Officers Academy students. Suddenly, Thales appears and knocks Byleth into a deep ravine. As narrated by Jeralt, Adrestia wins the Battle of Garreg Mach and forces the Knights of Seiros to surrender, and Rhea goes missing. The Empire then begins a full-scale war with Faerghus and Leicester.

Calendar - Lone Moon

Lone Moon
Monday Tuesday Wednesday Thursday Friday Saturday Sunday
1 2
Saint Indech Day Is ns01 special day.png
3 4 5 6 7
8 9 10 11 12 13 14
Ignatz's Birthday Is ns01 birthday yellow.png
Chapter starts here
16 17
Story Event Is ns01 story event.png
18 19 20
Constance's Birthday Is ns01 birthday yellow.png
Free Day Is ns01 free day.png
Choir Festival Is ns01 choir.png
Instruct Is ns01 instruct.png
23 24 25 26 27
Shamir's Birthday Is ns01 birthday yellow.png
Free Day Is ns01 free day.png
Rare Monster Sighting Is ns01 rare monster sighting.png
Story Event Is ns01 story event.png
30 31
Imperial Invasion Is ns01 story battle.png

Character data

Black Eagles Black Eagles, if siding with the church Blue Lions Blue Lions Golden Deer Golden Deer

New units
Small portrait seteth fe16.png
Wyvern Rider
Iron Lance
Intermediate Seal
Automatically from the start
Small portrait catherine fe16.png
Intermediate Seal
Automatically from the start
Small portrait shamir fe16.png
Iron Bow
Intermediate Seal
Automatically from the start if she was not recruited previously
Small portrait cyril fe16.png
Iron Axe
Intermediate Seal
Automatically from the start
Small portrait hilda fe16.png
Iron Axe
Talk to her with high enough Charm and Axe stats
Available characters
Byleth m 02 ​Ferdinand ​Linhardt ​Caspar ​Bernadetta ​Dorothea ​Petra ​Felix ​Ashe ​Sylvain ​Mercedes ​Annette ​Ingrid ​Lorenz ​Raphael ​Ignatz ​Lysithea ​Marianne ​Leonie ​Constance ​Balthus ​Hapi ​Yuri ​Anna ​Shamir ​Flayn ​Hanneman ​Manuela ​Alois ​

Item data

Name Obtainment Method
Is ns01 bullion.png Gold Monthly stipend
Is ns01 lance.png Silver Lance Tournament prize
Is ns01 shield.png Steel Shield Quest reward: Eagle Eye
Is ns01 potion.png Elixir Quest reward: Eagle Eye
Is ns01 stat booster.png Goddess Icon Exploration: Talk to Magic Wielder in the Shadow Library of Abyss*
Is ns01 seal.png Dark Seal Dropped by the Death Knight in The Battle of Garreg Mach
Is ns01 lance.png Crescent Sickle Dropped by enemy Cavalier in The Battle of Garreg Mach


Main article: To War/The Battle of Garreg Mach

Be warned that this is the last opportunity you will have to spend time in the monastery and recruit students from other houses before the end of Part I. Also note that at the end of the chapter, all of your inventory items will be automatically fully repaired, so feel free to cut loose during the final battle.

On the Azure Moon and Verdant Wind route, note that when Dimitri or Claude return in the next chapter, they will be automatically reclassed to their respective advanced class, and there will not be an opportunity to change their class again until Chapter 14. If they were using a magic-wielding class beforehand, they will lose access to their spells for the entirety of the next chapter, as their advanced classes—High Lord and Wyvern Master—are incapable of wielding magic. Lastly, it is suggested to avoid training Dimitri's or Claude's authority levels during the chapter unless they can surpass their current rank before the end of the month; at the start of Chapter 13, their authority will be increased to C if it is below that, but due to an oversight, any skill points they have gathered toward their next authority level will be lost at the start of the next chapter, even if they have higher than C authority.


  • The route split at the end of this chapter is the first one in the franchise to be determined by a decision made in a previous chapter, in this case the choice of which house to lead at the beginning of Chapter 1.

Etymology and other languages

Names, etymology, and in other regions
Language Name Definition, etymology, and notes

To War




Opening of a War; this parallels the Japanese name of Outset of a Power Struggle, the corresponding chapter if the player sides with Edelgard.


¡Es la guerra!

It is war!


La guerre est déclarée

War is declared


In den Krieg

In the War





전란의 개막

Start of a war

Simplified Chinese


Prelude to the chaos of war

Traditional Chinese


Prelude to the chaos of war


This section has been marked as a stub. Please help improve the page by adding information.


← Throne of Knowledge • To War • Reunion at Dawn →
Fire Emblem: Three Houses
Playable characters Black Eagles BernadettaCasparDorotheaEdelgardFerdinandHubertLinhardtPetra
Blue Lions AnnetteAsheDedueDimitriFelixIngridMercedesSylvain
Golden Deer ClaudeHildaIgnatzLeonieLorenzLysitheaMarianneRaphael
Other AloisAnnaDLCBylethCatherineCyrilFlaynGilbertHannemanJeritzaManuelaSetethShamir
Ashen WolvesDLC BalthusConstanceHapiYuri
Non-playable characters AbysskeeperDLCDuke AegirFlecheGatekeeperDuke GerthIonius IXJeraltJudithLadislavaNaderRandolphRheaRodrigueSothis
Bosses AcheronAelfricDLCAloisLord ArundelBiasBlaiddydCasparCatherineCharonChilonClaudeCorneliaDaphnelDedueDeath KnightDimitriDominicBaron DominicEdelgardFelixFerdinandFlame EmperorFlaynFraldariusGautierGloucesterGonerilGwendalHubertIngridThe Immaculate OneThe ImmovableJudithKostasKronyaLadislavaLamineLinhardtLonatoLorenzMercedesMetodeyMiklanMysonNaderNemesisBaron OchsDLCOdessePallardóPittacusRandolphRheaRieganRodrigueSetethShamirSolonSylvainThalesWandering BeastThe Wind Caller
Background characters Lord ArundelCount BergliezCorneliaMargrave GautierGlennCount GloucesterCount HevringHolstLambertMonicaPatriciaRufusSeirosSitriTomasTianaCount Varley
Personal weapons and regalia Aegis ShieldAreadbharAsclepiusAthameAxe of UkonvasaraAymrBlutgangCaduceus StaffCirce StaffCrusherFailnaughtFetters of DromiFreikugelThe InexhaustibleLance of RuinLúinOchain ShieldRafail GemScythe of SarielSeiros ShieldSpear of AssalSword of BegaltaSword of MoraltaSword of SeirosSword of the CreatorTathlum BowThunderbrandThyrsusVajra-Mushti
Chapters Part I
White Clouds
P: An Inevitable Encounter • 1: Three Houses • 2: Familiar Scenery • 3: Mutiny in the Mist • 4: The Goddess's Rite of Rebirth • 5: Tower of Black Winds • 6: Rumors of a Reaper • 7: Field of the Eagle and Lion • 8: The Flame in the Darkness • 9: The Cause of Sorrow • 10: Where the Goddess Dwells • 11: Throne of Knowledge • 12: To War Black Eagles, if Byleth sides against EdelgardBlue LionsGolden Deer / Outset of a Power Struggle Black Eagles, if Byleth sides with Edelgard
Part II Silver Snow
Silver Snow
13: Reunion at Dawn • 14: A King Without a Kingdom • 15: Valley of Torment • 16: The Rose-Colored River • 17: The Impregnable Fortress • 18: The Chaos of War • 19: Conclusion of the Crossing Roads • 20: The City Without Light • 21: Following a Dream
Azure Moon
Azure Moon
13: Reunion at Dawn • 14: The Delusional Prince • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The King's Triumphant Return • 19: The Golden Deer's Plea • 20: The Impregnable Fortress • 21: Our Chosen Paths • 22: Oath of the Dagger
Verdant Wind
Verdant Wind
13: Reunion at Dawn • 14: The Alliance Leader's Ambitions • 15: Valley of Torment • 16: The Rose-Colored River • 17: Blood of the Eagle and Lion • 18: The Golden Scheme • 19: The Chaos of War • 20: Conclusion of the Crossing Roads • 21: The City Without Light • 22: Fódlan's New Dawn
Crimson Flower
Crimson Flower
13: Beyond Escape • 14: The Master Tactician • 15: Tempest of Swords and Shields • 16: Lady of Deceit • 17: Field of Revenge • 18: To the End of a Dream
Paralogues Paralogues Part I Black Market SchemeDLCA Cursed RelicDLCDeath TollDividing the World Black Eagles, if Byleth sides against EdelgardBlue LionsGolden DeerFalling Short of HeavenThe ForgottenLand of the Golden DeerAn Ocean ViewOil and WaterRumored NuptialsThe Secret MerchantDLC Blue LionsGolden DeerSword and Shield of SeirosTales of the Red CanyonTrue ChivalryWar for the Weak Blue Lions
Part II Darkness Beneath the Earth Crimson FlowerDividing the World Silver SnowAzure MoonVerdant WindEternal Guardian Silver SnowAzure MoonVerdant WindThe Face Beneath Silver SnowAzure MoonVerdant WindForeign Land and SkyForgotten HeroInsurmountable Crimson FlowerLegend of the LakeRetribution Silver SnowAzure MoonVerdant WindThe Secret MerchantDLC Crimson FlowerThe Silver Maiden Azure MoonThe Sleeping Sand Legend Verdant WindWeathervanes of Fódlan Azure Moon
Cindered Shadows
Cindered Shadows
1: The Fourth House • 2: What Lies Beneath • 3: The Rite of Rising • 4: Danger in the Dark • 5: Betrayal • 6: Return to Me • 7: Wolf Pack
Locations FódlanAdrestiaFaerghusGarreg Mach Monastery (Abyss) • LeicesterAlmyraBrigidDagdaSrengZahras
Groups, objects and concepts 10 ElitesAshen WolvesBlack Eagles (Black Eagle Strike Force) • Blue LionsChildren of the GoddessChurch of Seiros (Knights of Seiros) • Crests (Crest Stone) • Divine PulseGolden DeerHeroes' RelicsInsurrection of the SevenMonstersThose who slither in the darkTragedy of DuscurWar of Heroes
Lists AbilitiesChaptersCharactersClasses (Class change) • Hidden treasureItems (Monastery items) • QuestsScriptsSupportsWeapons
Related topics Music LibraryName chart • Other games (Warriors: Three Hopes) • Pre-release informationUnused contentDownloadable contentClass mastery