First Nexus War

The First Nexus War was the first large-scale conflict between Equis and Noctis, fought over the construction of the Nexus.

Location
Most battles of the First Nexus War were fought either in the Free Reach on Equis or the Fell Plains on Noctis. This is because these were the locations of the Equis and Noctis sides of the Nexus, respectively.

Causes
The first iteration of the Nexus was constructed on Equis in the Free Reach, a collection of small countries banded together in a loose alliance, mainly to protect themselves from the then tremendously powerful Empire of Ravens, which was situated next to the Reach. The Free Reach began building their half of the Nexus in collaboration with the people of Fellspire, where the Noctis half was being built.

Shortly after construction was completed, Hamann -- the Immortal of fire and vizier to the Raven Emperor -- claimed to receive visions from Ephereos, the god of fire. He claimed to have seen all the great cities of the Empire of Ravens set ablaze, and he said that it was clear that the elts of Noctis were responsible. The Nexus, he said, was just a means for them to get access to their peaceful empire and destroy it for unknowable reasons.

The Raven Emperor ordered the Free Reach to destroy their half of the Nexus, but they refused and instead aligned themselves with Fellspire. Geffuhr's troops were allowed to move onto Equis soil, beginning the First Nexus War.

Battles
Numerous battles were fought over the course of the First Nexus War as troops pushed into and out of Noctis and Equis on both sides.

Aftermath
After massive bloodshed, the war reached an unexpected conclusion when an elt named Orzan learned ancient, long-forgotten High Magic of death from the Immortal Albrek Bane. Orzan used this magic to destroy the Lockean moon, the Plexic anchor of the Black Gates, and smashed the resulting debris into Equis.

Among the other massive collateral damage this caused, it had the effect of destroying the Nexus, severing the connection between Equis and Noctis and preventing further conflict.