Gaiaterra: Elysea's Conflict/The Timeline of Gaiaterra

Age Of Darkness (insert V.C.-insert V.C.)
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Also known as the End Times, The Age Of Sorrow, and the Shattering Of Nations. Called so because of it being the bloodiest period of history, even when compared to modern battles, with only the horrors of Embry and Aden matching up to a fragment of the age. The Age Of Darkness is first marked by the first Chaos Incursion, led by the first Demon Prince Be'lakor, whose old name is lost to time, that led to the shattering of many nations, such as the Dwarfs that would become the Coalition abandoning their settlements to ride out the war in their mountain homes/fortresses, and the birth of new ones as millions of refugees fled the coming darkness and settling into unknown lands in the hopes of escaping Chaos, most of the modern nations, such as Cantha and Aio of the Coalition, were descendants of these refugees. And was the first largest, bloodiest, conflict in Gaiaterra history.

Followed by the rise of Nagash, the first (dark) necromancer, causing an event known as the "End Times", as many scholars had feared that Nagash couldn't be stopped, leading to the fall of once great kingdoms like Gilneas, Sylvania, Valyria, etc. A bloody war where generations were wiped out as they fought against the rising tide of undead. But eventually sealed Nagash within a special temple, though most of his undead generals had escaped but were weakened, with the kingdom of Ridgburg, where Nagash was born, having to destroy itself to stop the undead, though the kingdom only went into stasis, its people existing in a state of death and undeath.

By the end, the surviving kingdoms, mainly made of orphaned teens and children and a few long-lived races some of whom still lived today (such as Iver of the Wolf Clan or Elrond Half-Elven of the Communes), were cast into an uncertain future and forced to pick up the shattered pieces and rebuild. And where the Grey Steel Order was born, to ensure that such a tragedy never happens again. Even today there are many records of the event lost to time, with only long-lived races such as the Commune Elves and the Varl being the reason why they had more knowledge of the period that they should, and the population of today is only one-third of the population before Nagash.

Age Of Dawn (insert V.C.-insert V.C.)
Also known as the age of settlements, the age of uncertainty, or the age of resurgence. The Age Of Dawn was born out of the generation that survived the Age Of Darkness, having to rebuild their shattered homes. A time in which small, isolated kingdoms were founded while the kingdoms that survived hunkered down and began recovering.

Age Of Iron (insert V.C.-insert V.C.)
Also known as the age of kingdoms, the age of chivalry, or (boringly) middle age, the Age of Iron was born out the generations from the Age Of Dawn, now desiring to expand their kingdom and reclaim the lands lost to Nagash. Leading to the rise of many feudal kingdoms, a few of which still stands today.

Renaissance (1200 V.C.-1400 V.C.)
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One of the most (in)famous discoveries of this time was gunpowder. Invented by Elsword chemist in the hopes of finding the potion of immortality.

Age Of Horizon (1400 V.C.-insert V.C.)
So named because the people of Eorzea desire to reach new horizons. The Age Of Horizon marks the first time in Gaiaterra history when the people of Eorzea began to sail out to sea to explore and settle new lands and trade routes. With such expeditions, from east to west, leading to nations that would eventually become Aquila, Zemuria, Embry, and so on. And going past the borders of their homes to meet the Katsuragis, Garleans before Voshkod rise, the people of Cantha, the Coalition, and so on.

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Age Of Fire And Gunpowder (insert V.C.-insert V.C.)
Considered as a bridge to the old and new ways of warfare. The Age is so named as the power of industry reached its first peak. From the first diesel engine to metal cartridges it was an age where science and technology were thought limitless. But was also the first time where many thoughts and ideas were upended and shattered, such as the Aquila War For Independence being the first stone that shattered the colonial empires, the Horus Heresy that finally destroyed the Coalition ambition of conquest, the great (insert Napoleonic war equivalent) shattering the feudal systems and the thought of "god-given rule", among many others.

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The Great Voshkod-Aquilan War (insert V.C.-insert V.C.)
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The GVAW was also the first dawning of the new battlefield. With the age of infantry waves and trenches replaced with mechanized forces and aircraft.