Third Underworld War

* Dissolution of the Underworld Legion and the Nine Noble Families of the Underworld
* Death of Desfelmion, Aldrych, most of the Nine Demon Lords, Ramay Berith and many more
* Over 30% of the Underworld population killed
* Formation of the Underworld Union

Combatants and factions| **Twelve-World Alliance*** Holy Kingdom of Earth
	+ Earth Defense Force
* + Justice Alliance of Earth
		- Young Braves Brigade
		- League of Super Robots
	+ Angry Army
	+ Japan
		- Taimanin
	+ United States
	+ Canada
	+ United Kingdom
	+ European Union
		- Germany
		- France
		- Sweden
		- Norway
		- Ireland
		- Spain
		- Portugal
	+ Republic of Korea
	+ Taiwan
	+ Philippines
	+ India
	+ Australia
	+ Israel
	+ Allied-occupied China
* Vladian Pact
	+ Underworld Commonwealth government-in-exile
		- Rofocale Kingdom
* + - Vaal Federation
* + - Principality of Revia
* + - Asmodian Republic
* + Kingdom of Vlad
* Forces of Heaven
* Fallen Angels
* Red World
* Green World
	+ Gaia Hazards
* White World
* Yellow World
* Purple World
* Blue World
* Alfheim
* Norse pantheon
* Mount Olympus
* Greek pantheon
* Takamagahara
	+ Japanese pantheon
* Asmodian Empire
* Rofocale Kingdom
* Vaal Federation
* New Belian Kingdom
* Mycenaean Empire
* Dinosaur Empire
* Hyakki Empire
* Youma Empire

**Co-belligerents:*** NOMAD
* Sindicate of Moonless Night

Commanders| **Alphadios** (Artificial Vessel of El)* Jesus Christ (King of Kings)
	+ Magdalena Florentina (Masyaf of Alphadios)
	+ Michael (High Commander of the Angels)

 **Ichirou Tachibana** (King of the Holy Kingdom of Earth and Grandmaster of the Justice Alliance)* Asagi Igawa (Strongest Taimanin and Supreme Commander of the Taimanin)
* Joe Rojas (Leader of the Angry Army)

 **Saron Lucifer** (High Minister of the Underworld Commnowealth and King of Rofocale)* Cara Cromwell (Queen of Vlad and Leader of Vladian Pact)

•  Adis Beelzebub (President of Vaal and Leader of Underworld Commnowealth government-in-exile)•  Sarah Leviathan (Princess of Revia)•  Ocharos Asmodeus (Grand Consul of Asmodian Republic)**Azazel** (Leader of the Fallen Angels)**Naturalia** (Queen of the Green World) | **Desfelmion** † (Undergod and Shell of Lucifer)**Aldrych**/**Socradrych** † (Dark Lord of the Underworld and Supreme Leader of the Underworld Legion/The Dark Grandwalker and Fusion of Socrato and Aldrych)* Bismarck † (Chancellor of the Realm)
* Teutates † (Emperor of the Asmodian Empire and the Corpse Lord)
	+ Wight

•  Ramay Berith † (King of Rofocale)* Ereshkigal † (Interim Phantom Lord)
* Ceres † (High Lady of Vaal and The Assassin Lord)
	+ Ares
* Samael †
	+ Great Marshall of Hell
	+ Baron Ashura ⚐
	+ Count Brocken
* Hades (Emperor of the Mycenaean Empire)
	+ Great Admiral of Destruction †
	+ Great General of Darkness †
	+ Archduke Gorgon †
* Gore III † (Emperor of the Dinosaur Empire)
* Jakimaru † (Emperor of the Hyakki Empire)
* Barao † (Emperor of the Youma Empire)
* Kali ⚐
* Loki ⚐
* Balor †

Strength and forces| **Total strength:*** 70,000,000+ human soldiers
	+ 800+ superheroes
	+ 1,800+ Taimanin
	+ 5,000+ kaiju
	+ 15,000+ pilotable mechs
	+ 23,000+ artillery vehicles
	+ 80,000+ aircrafts
* 600,000 anti-Legion Rofocalians
* 1,200,000 Vaalians
* 820,000 Revians
* 700,000 Asmodians
* 60,000 Dragnos
* 54,000 Metallians
* 410,000 angels
* 200,000 fallen angels
* 90 warships
* 200,000,000+ orcs
* 2,710,000+ goblins
* 4,580,000+ trolls
* 58,900,000+ incubi/succubi
* 12,100,000+ vampires
* 158,500,000+ undead
* 5,600,000+ youkai
* 180,000+ infernals
* 3,900,000+ other monsters
* 359,180,000+ other demons
* 150,000+ kaiju
* 360,000+ artillery vehicles
* 1,560,000+ aircrafts

Casualties and losses| Heavy* 15,800,000+ dead or missing
* 4,770,000+ sick or wounded
* 3,800,000+ captured/POWs
* 5,000+ artillery destroyed
* 18,000+ aircrafts
* 120,000,000+ wounded
* 84,500,000+ captured
* 190,000,000+ civilians dead

> *“For years, for centuries and for millennia, the demons have manipulated and controlled humanity and the will that we had that was damaged and forgotten six thousand years ago. Now, they sought to make us destroy ourselves and then destroy us. I say no more! No more shall the Underworld keep humanity chained to the surface and succumbed to their power and darkness! On this day and in the days after, we will make the Underworld Legion pay for the transgressions they have done not only against the Earth but against their own peoples! In the name of God, mankind and the very justice we fight for years, we will take the fight to them, to the demons and the Underworld!”*
> —Ichirou Tachibana
>
>

The **Third Underworld War** (第三次魔界大戦, *Dai-san-ji Makai Taisen*?) was a realm-wide conflict instigated by the Earth-led Twelve-World Alliance, a grand coalition of forces from across twelve different realms, against the Underworld Legion which held control over the Underworld since the Second Underworld War. In response to the revelations that the Legion and demonkind manipulated many events on Earth leading up to World War III and a failed invasion to conquer the human world and extinguish humanity, the Alliance, largely led by the newly-crowned King of the Holy Kingdom of Earth Ichirou Tachibana, was formed and initiated a massive invasion on the entire Underworld that lasted for nearly eight months.

After months of intense fighting and massive casualties on both sides, the invasion ended with the utter destruction of the Underworld Legion, the lost of nearly all of its leaders and fighting forces, the Treaty of Gremorin at the tail end of 2038 and the dissolution of the Underworld Commonwealth for the formation of the more-centralized Underworld Union.