The fallen attack the city because they want the Traveller back. Some, at least, think we stole The Traveller/Great Machine. Skolas tells us [quote]Always remember that we came to this star in hope. And remember that we were denied! Remember the City of the Death of Children, the City That Docks, which claimed for itself the Great Machine that might have saved us.[/quote] It's unlikely that many of the fallen would ally with us, Skolas goes on to say [quote]Remember the City of the Death of Children, the City That Docks, which claimed for itself the Great Machine that might have saved us. Remember the City that even now sends its ghouls to murder our Primes, starve our ether, and leave our young to die gasping. Curse that City and its name. The curse is just.[/quote] Variks also gives us the following [quote]Why do the Guardians get the Great Machine's blessing, was it like that before the Whirlwind, were there Fallen heroes crowned in Ghosts who strode the battlefield fearless and full of Light?[/quote] So it is clear that the Traveller gave the fallen a golden age similar to ours. When the whirlwind happened chelchis, kell of stone, stood before the maw to buy the fallen time to escape. He is quoted as saying "where is the great machine? Where is the great machine?". This was possibly a rhetorical question the way some people call out to God in times of need.

It's the second one according to myelin games

You ready for an unnecessarily long post about the history of the Fallen, just for you (because I got bored)? The Fallen had the Traveler before we did, they had their Golden Age, and then the Darkness came. The Eliksni version of the Collapse is the Whirlwind. It's said in the "Doom of Chelchis" Scout rifle that Chelchis, Kell of House Stone, stood against the "Maw". It's theorized that the Maw is Oryx, as Oryx and the Hive chance the Traveler (especially Oryx, as it caused the Zyzygy (or god wave) to destroy what small piece of their long-lost home on Fundament). The Traveler arrives on Mars, and Ares One is sent to Mars, as seen in the very first cutscene. Humanity's Golden Age occurs, human lifespan tripled, Mercury became a garden world yada yada yada. The Darkness comes, the Collapse happens, now we're in the Destiny we play in-game just further in time. The Traveler goes to wherever (I think near the fertile crescent) and the Titans of the Firebreak(?) Order build the walls to protect the City against the Fallen, whom I think have just arrived in the system searching for the Traveler. The House of Devils attacks all six sides of the City's walls trying to reclaim the Traveler, and four orders of Titans are commanded to hold the line; not one order broke. This was the Battle of Six Fronts, and also Saint-14's crusade against the Fallen. Some things may have happened in between, im not sure, but then Twilight Gap happens, where all of the Fallen houses (except House of Wolves, who was intercepted by the Queen on Ceres resulting in the Reef Wars) attack the City again, trying again. (By now, I've forgotten why I am writing this but oh well). Then Ghost revives the Guardian some time later, we single-handedly destroy 3 Houses (Devil: we killed the Archon and Sepiks Prime, Winter: we killed their Kell and an Archon that was stolen, Servitor presumed to be destroyed, Wolf: all who followed Skolas and Skolas's minors like Peekis), and the surviving Devils finally find what they've been looking for; SIVA. The Devil Splicers use SIVA as a new "god" of sorts, as the Fallen use Machines as gods (evident in Servitors and how they call the Traveler "the Great Machine"), and the Guardian teams up with Lord Saladin, Shiro-4, and Tyra Karn to destroy SIVA, blow up the Replication chamber, and eliminate Aksis in the Perfection Chamber. By now, it's almost too late to be allied with the Fallen, but, as evident in one of the new AoT cards, Prince Uldren is said to have somehow made a truce with the Kell of Kings, and we only have small glimpses into their power.

Already confirmed lore that the Traveler visited the Eliksni world and made them strong like it did with us, but when the Darkness came (as far as we can tell it was Oryx and his brood) the Traveler fled as it always did and the Eliksni were destroyed and reduced to the Fallen When the Fallen came to our system they were upset that the Traveler had paired with another species and they tried to take it back by force, believing that we had stolen it from them. The Fallen actually love the Light and despise the Darkness, but in their misguided attempts to live under the Light once again they have made themselves our enemies are now accidentally helping the Darkness destroy the Light They could be our allies if we could only make them realize that we can live together under the Light and forget all the horrible things both humanity and the Fallen have done to each other

Wow! Something actually got you thinking? Your parents must be proud!

Well whenever I do the Taniks strike variks says that I'm challenged.

The whirlwind was the event that destroyed the Eliksni, which was some kind of event that caused the traveller to leave them. Some claim this was their version of the collapse with the darkness arriving but the way it's positioned seems more like their own actions caused the traveller to lose faith in them.

Variks is also my favorite character, and the Eliksni are my favorite faction as well

If i remember correctly the traveler first helped the fallen and then abandoned them