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#### **The Primordial Age (Pre-Dalereckoning)**
- **Before -35,000 DR: Formation of Gehenna**
- Gehenna is created as a plane of balance between **lawful evil** and **neutral evil**, representing the harsh ambition and exploitation found in both alignments.
- The **yugoloths**, created by unknown entities (or possibly the first fiends), settle in Gehenna as their home, shaping the plane with their hierarchies and schemes.
- **The Dawn War:**
- During the war between the **primordials** and the gods, Gehenna becomes a neutral ground where yugoloths offer their services to both sides.
- The plane itself remains untouched by the larger conflict, as the yugoloths prioritize profit over allegiance.
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#### **The Rise of Yugoloth Power (-30,000 DR to -10,000 DR)**
- **-30,000 DR: The Citadels of Gehenna**
- The yugoloths establish their first great strongholds, including the infamous **Tower of the Arcanaloth** on Khalas.
- These citadels become centers of trade, diplomacy, and war profiteering.
- **-25,000 DR: The Blood War Begins**
- As the eternal conflict between demons and devils erupts, the yugoloths position themselves as mercenaries, offering their services to both sides.
- Gehenna becomes a critical logistical hub for the Blood War, with armies and resources passing through the plane.
- **-20,000 DR: The Pact of Neutrality**
- The yugoloths declare official neutrality in the Blood War, though they continue to sell their services to both demons and devils.
- This neutrality cements Gehenna’s reputation as a place where even mortal warlords and planar powers can negotiate contracts.
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#### **The Age of Mortal Ambition (-10,000 DR to -1,000 DR)**
- **-10,000 DR: The Betrayer’s Haven**
- Gehenna becomes a refuge for mortal warlords, necromancers, and schemers who betray their allies and seek sanctuary from divine or planar retribution.
- These exiles often end up as pawns in the yugoloths’ schemes.
- **-7,000 DR: Summoning of the Yugoloths**
- Mortal civilizations begin summoning yugoloths as mercenaries for their wars.
- Yugoloth contracts become notorious for their precision and cruelty, with hidden clauses that often doom those who summon them.
- **-5,000 DR: The Netherese Bargains**
- Netherese archmages bargain with yugoloths for forbidden knowledge and powerful artifacts.
- The yugoloths grant them destructive magic but ensure that the Netherese wizards ultimately destroy themselves through hubris.
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#### **The Age of Empires (-1,000 DR to 1358 DR)**
- **-1,000 DR: The Rise of Mercenary Kings**
- Mortal rulers and planar generals use Gehenna as a base for their mercenary operations.
- The yugoloths exploit these warlords, profiting from their ambitions and betraying them when it suits their plans.
- **500 DR: Construction of the Siege Palaces**
- On Chamada, the second layer of Gehenna, massive citadels known as **Siege Palaces** are constructed.
- These palaces serve as gathering points for yugoloth armies and as marketplaces for weapons and contracts.
- **714 DR: The Fall of Myth Drannor**
- Yugoloths are summoned to fight in the siege of Myth Drannor, turning the tide of battle against the defenders.
- The plane absorbs several artifacts and powerful spirits from the fallen city, adding to its wealth and power.
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#### **The Time of Troubles and Gehenna’s Schemes (1358 DR)**
- **1358 DR: The Time of Troubles**
- During the chaos of the gods walking Faerûn, yugoloths seize the opportunity to expand their influence.
- Several minor deities and powerful mortal souls are lured into Gehenna with promises of sanctuary, only to become prisoners or pawns.
- **The Betrayal of the Fiendlords:**
- Certain yugoloth generals, seeing the chaos as a chance to consolidate power, betray their masters and establish independent strongholds on Kanalos, the fourth layer.
- These uprisings are quickly crushed, but the betrayal weakens yugoloth unity.
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#### **The Spellplague and Gehenna’s Unrest (1385 DR to 1487 DR)**
- **1385 DR: The Spellplague**
- The collapse of the Weave disrupts planar travel, reducing the number of contracts the yugoloths can broker.
- Gehenna’s influence wanes slightly, though its role in the Blood War ensures its survival.
- **1390 DR: The Rise of the Magmalords**
- On Chamada, powerful elemental creatures known as **Magmalords** rise to prominence, challenging yugoloth authority over the plane.
- The conflict ends with the yugoloths binding the Magmalords into servitude, further cementing their control.
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#### **The Second Sundering and Modern Era (1484 DR to Present)**
- **1484–1487 DR: The Second Sundering**
- The restoration of the **Tablets of Fate** reestablishes planar balance, allowing Gehenna to recover its lost influence.
- The yugoloths strengthen their control over the Fourfold Furnaces, expelling rogue factions and reasserting their dominance.
- **1492 DR: Baldur’s Gate 3 and Mercenary Deals**
- Yugoloth agents manipulate events in Baldur’s Gate, offering their services to mortal factions in exchange for long-term contracts.
- Adventurers uncover and thwart some of these schemes, though Gehenna’s influence in the Material Plane persists.
- **Present Day:**
- Gehenna remains a plane of greed, ambition, and exploitation.
- Yugoloth power is unchallenged, and the plane continues to serve as a marketplace for mercenaries, weapons, and forbidden knowledge.
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### **Themes of Gehenna’s Timeline**
1. **Greed and Exploitation:**
- Gehenna thrives on ambition and self-interest, reflecting the worst aspects of greed and manipulation.
2. **Neutral Ground for Evil:**
- The plane is a hub for mercenary activity, contracts, and diplomacy between the fiends of the Lower Planes.
3. **Mortal Hubris:**
- Mortals often interact with Gehenna out of ambition, only to find themselves betrayed or destroyed by the yugoloths.
4. **Adventuring Opportunities:**
- Gehenna offers challenges such as navigating its treacherous slopes, negotiating with yugoloths, and uncovering ancient secrets hidden in its fiery depths.
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