This article is about the chapter inFire Emblem: Three Houses. For the chapters inFire Emblem Warriors: Three Hopes, seeTo War! (Azure Gleam) andTo War! (Golden Wildfire).

To War (Japanese:戦乱の幕開けOpening of a War) is the twelfth chapter ofFire 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.

Plot

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

Shamir reports thatEdelgard's forces are going to meet up with the main Imperial army and invadeGarreg Mach Monastery in two week's time.Rhea ordersByleth 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 theAdrestian 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 byLord 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. SeveralDemonic 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 byJeralt, Adrestia wins the Battle of Garreg Mach and forces theKnights of Seiros to surrender, and Rhea goes missing. The Empire then begins a full-scale war withFaerghus andLeicester.

Calendar - Lone Moon

Lone Moon
Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
1	2 Saint Indech Day	3	4	5	6	7
8	9	10	11	12	13	14 Ignatz's Birthday
15	16	17 Story Event	18	19	20 Constance's Birthday	21 Free Day Choir Festival
22 Instruct	23	24	25	26	27 Shamir's Birthday	28 Free Day Rare Monster Sighting
29 Story Event	30	31 Imperial Invasion

Character data

Black EaglesBlue LionsGolden Deer

Characters
New units
Seteth Wyvern Rider HP 48 Inventory Iron Lance Intermediate Seal Level 23 Automatically from the start Catherine Swordmaster HP 46 Inventory Thunderbrand Intermediate Seal Level 21 Automatically from the start Shamir Sniper HP 39 Inventory Iron Bow Intermediate Seal Level 21 Automatically from the start if she was not recruited previously Cyril Commoner HP 35 Inventory Iron Axe Intermediate Seal Level 21 Automatically from the start Hilda Brigand HP 49 Inventory Iron Axe Vulnerary Bullion Level 23 Talk to her with high enough Charm and Axe stats
Available characters

Characters
New units
Seteth Wyvern Rider HP 48 Inventory Iron Lance Intermediate Seal Level 23 Automatically from the start, unless Flayn has fallen in Classic Mode.
Available characters

Characters
New units
Seteth Wyvern Rider HP 48 Inventory Iron Lance Intermediate Seal Level 23 Automatically from the start, unless Flayn has fallen in Classic Mode.
Available characters

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Item data

Items

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

Strategy

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 whenDimitri orClaude return inthe 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 andWyvern Master—are incapable of wielding magic. Lastly, it is suggested to avoid training Dimitri's or Claude'sauthority 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.

Trivia

• 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 ofChapter 1.

Etymology and other languages

Gallery

• 
  The opening mural for Chapter 12.
• 
  Rhea transforms intoThe Immaculate One.

References

Fire Emblem: Three Houses

Playable characters Black Eagles Bernadetta •Caspar •Dorothea •Edelgard •Ferdinand •Hubert •Linhardt •Petra Blue Lions Annette •Ashe •Dedue •Dimitri •Felix •Ingrid •Mercedes •Sylvain Golden Deer Claude •Hilda •Ignatz •Leonie •Lorenz •Lysithea •Marianne •Raphael Other Alois •AnnaDLC •Byleth •Catherine •Cyril •Flayn •Gilbert •Hanneman •Jeritza •Manuela •Seteth •Shamir Ashen WolvesDLC Balthus •Constance •Hapi •Yuri Non-playable characters AbysskeeperDLC •Duke Aegir •Fleche •Gatekeeper •Duke Gerth •Ionius IX •Jeralt •Judith •Ladislava •Nader •Randolph •Rhea •Rodrigue •Sothis Bosses Acheron •AelfricDLC •Alois •Lord Arundel •Bias •Blaiddyd •Caspar •Catherine •Charon •Chilon •Claude •Cornelia •Daphnel •Dedue •Death Knight •Dimitri •Dominic •Baron Dominic •Edelgard •Felix •Ferdinand •Flame Emperor •Flayn •Fraldarius •Gautier •Gloucester •Goneril •Gwendal •Hubert •Ingrid •The Immaculate One •The Immovable •Judith •Kostas •Kronya •Ladislava •Lamine •Linhardt •Lonato •Lorenz •Mercedes •Metodey •Miklan •Myson •Nader •Nemesis •Baron OchsDLC •Odesse •Pallardó •Pittacus •Randolph •Rhea •Riegan •Rodrigue •Seteth •Shamir •Solon •Sylvain •Thales •Wandering Beast •The Wind Caller Background characters Count Bergliez •Margrave Gautier •Glenn •Count Gloucester •Count Hevring •Holst •Lambert •Monica •Patricia •Rufus •Seiros •Sitri •Tiana •Count Varley Legendary and personal weapons Aegis Shield •Areadbhar •Asclepius •Athame •Axe of Ukonvasara •Aymr •Blutgang •Caduceus Staff •Circe Staff •Crusher •Failnaught •Fetters of Dromi •Freikugel •The Inexhaustible •Lance of Ruin •Lúin •Ochain Shield •Rafail Gem •Scythe of Sariel •Seiros Shield •Spear of Assal •Sword of Begalta •Sword of Moralta •Sword of Seiros •Sword of the Creator •Tathlum Bow •Thunderbrand •Thyrsus •Vajra-Mushti Chapters Part I 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 /Outset of a Power Struggle Part II 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 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 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 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 Part I Black Market SchemeDLC •A Cursed RelicDLC •Death Toll •Dividing the World •Falling Short of Heaven •The Forgotten •Land of the Golden Deer •An Ocean View •Oil and Water •Rumored Nuptials •The Secret MerchantDLC •Sword and Shield of Seiros •Tales of the Red Canyon •True Chivalry •War for the Weak Part II Darkness Beneath the Earth •Dividing the World •Eternal Guardian •The Face Beneath •Foreign Land and Sky •Forgotten Hero •Insurmountable •Legend of the Lake •Retribution •The Secret MerchantDLC •The Silver Maiden •The Sleeping Sand Legend •Weathervanes of Fódlan 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 Fódlan •Adrestia •Faerghus •Garreg Mach Monastery (Abyss) •Leicester •Oghma Mountains •Shambhala •Almyra •Brigid •Dagda •Sreng •Zahras Groups, objects and concepts 10 Elites •Ashen Wolves •Black Eagles (Black Eagle Strike Force) •Blue Lions •Calendar •Children of the Goddess •Church of Seiros (Knights of Seiros) •Crests (Crest Stone) •Divine Pulse •Four Apostles •Four Saints •Golden Deer •Heroes' Relics •Insurrection of the Seven •Monsters •Those who slither in the dark •Tragedy of Duscur •War of Heroes Lists Abilities •Chapters •Characters •Classes (Class change) •Hidden treasure •Items (Monastery items) •Quests •Scripts •Supports •Weapons Related topics Class mastery •Documents •Downloadable content •Movie Gallery •Music Library •Minor characters •Name chart • Other games (Warriors: Three Hopes) •Pre-release information (Unused content) •Timeline