Around Year 180 VC(Veritasian Calendar), the Eldranian discovered other humans, specifically the Dula-Hathran and Garagari. The Eldranian worldview staggered. For centuries, the Eldranians had believed that they were the only group of intelligent beings in the world, and that Eldos had granted them the world to inherit. But now, this belief was called into question. Word was sent back to the Eldar, the semi-divine high priest, and all Eldrania awaited his answer.
And for reasons we shall never know, rather than alter his worldview to something vaguely representing a normal one, this Eldar chose the polar opposite. Instead of believing in the evidence of his eyes, he believed in his faith. These others, he declared, were no humans, but demons sprung up from the Void (which Eldism had gradually developed from alien, uncaring coldness to conscious, spiteful hate) to challenge the rightful dominion of Eldrania.
Thus begun the Eldranian Crusade, the first religious war in history, a war that would last for centuries, that would see the genocide of an entire race, that would spill untold amounts of blood on the soil of the mountain pass that was to be its main battle ground, at least for its first two and a half centuries.
By 182, the Eldranian Crusade had begun. Although the Eldranians had success in the first, small-scale raids against the Dula-Hathran, the war did not begin in earnest until around 220. While Khmeri was developing the wheel, the Eldranian armies were marching.
And at first, they seemed invincible. They won victory after victory in the first 20 years, and it seemed nothing could stop the fanatical hordes. But around 240, one of the many twist of fate happened, which effected what was to come dramatically. Alarmed by the Eldranian xenocidal tendencies, the local tribes formed a loose coalition and attacked the Eldranians. This in itself did not matter to the Eldranians; these were simply more demons, and they were crushed the same way as all the others.
But the Eldranians had to move troops away from the battle in the pass, and this gave Dula-Hathran time to regroup and build primitive fortifications in the only pass through the mountain range that was preventing unchecked Eldranian expansion. When the Eldranians marched again around 270, they were soundly defeated and repelled, and this continued for the next hundred years.
However, the constant attacks destabilized the Dula-Hathran, and when the leaders of the Dula and Hathran perished while repelling yet another attack on their city of Highpass in 372 VC, the population realized they could not survive on their own. So they turned to Gargari, the other primary nation in the fight against Eldrania, who was already aiding them. In that same year, the Dula and the Hathran were absorbed into the Gargari nation.
With the best minds of 3 peoples working on their mutual defense, a seemingly foolproof plan was hatched. The allied forces would seem to retreat from the Duality Pass, and the Eldranians, being foolish barbarians, would rush forward. But the allies would reappear behind them, and the Zealots would be attacked and crushed.
The plan was executed around 380 VC, and it worked perfectly. The Eldranians took the bait, and the trap was sprung. It seemed the Eldranians would have to attack the pass again, and be massacred.
But the Gargari had miscalculated. The Eldranians were even more barbaric then was thought. Instead of realizing the obvious, that they were trapped, the Eldranian commander saw only that there was no longer an army barring the way into the fertile lands of the former Dula-Hathran. And so they proceeded, in a wild half-decade moving through the land, sacking and killing as they went, and were only stopped and finally destroyed on the very doorstep of the enemy capital. Ultimately, the Eldranians did not benefit from this exploit. Dula-Hathran lay in ruins, but the Eldranians were now outnumbered three to one. In 440 VC, the end of the Crusade seemed in sight.
But the Eldranians had one last trick. They decided to use the mountains as their ally, rather than treating it as their enemy. To that end, an elite force of mountaineers was prepared. And in 441 VC, they struck. They moved through the mountains, attacked the Gargari from behind in the dead of night, and extinguished their campfires. That was the signal for the main Eldranian force to attack. In the chaos that resulted, every Gargari, Dula, and Hathran was cut down. None survived to tell of the defeat, so the former Dula-Hathran lands were completely unprepared when the Eldranians arrived. And there was no force to oppose them. They sacked. They pillaged. They burned. But most of all, they genocided. Every single Dula and nearly all of the Hathran were killed. Two entire peoples, two entire bloodlines, were wiped out of existence.
And now the vast, fertile plains lay open for the Eldranians. And the fertile Kalmar lands were only a short distance downstream...