This post is exactly what it says on the tin. So, let's dive right into it...
Welcome to the Prothean Empire ! The Protheans are fighting the Metacon War and things are not going well. So they decide, lets send an expedition to the galaxy next door to enslave us some reinforcements. Here comes the plot twist...
Andromeda is the modern (2180's) name for that galaxy. But what did the Protheans call it ? What if the Jardaan are called the Jardaan, because the Protheans called it the Jardaan Galaxy. And it was the Jardaan Expeditionary Force. So the people on the mission started calling themselves Jardaan and it stuck.
(For Stargate Atlantis fans....like the folks Stargate Command send to Atlantis became known as Lanteans to the folks in the Pegasus Galaxy.)
Now, there is the little hiccup of the timeline. From what Javik said, the Metacon War was happening when the Reapers showed up to end everything. So this expedition would have been thousands of years ago, while things in Andromeda only went pear-shaped a couple of hundred years before Mass Effect: Andromeda.. (While the Andromeda Initiative was in transit.) But then I had an idea...
Even with Prothean technology, going from one galaxy to another takes a long time. And without Mass Relays, you need another way to go faster then light and compensate for the pesky thing called relatively. My idea is that whoever the Protheans were fighting found out about the Expedition and decided to commit a little old-fashioned sabotage. This resulted in a trip that should have taken several centuries stretching into thousands of years. (Possibly tens of thousands.)
Undeterred by this little...uh...delay...the Jardaan continued with their mission and happily enslaved the Kett. Except they botched explaining the plan to the Kett. Javik said that the plan was to bring all the organic sentient species together in the Empire. Of course, he was talking METAPHORICALLY. But the Kett took the plan LITERALLY. And thus Exaltation enters the picture....
And that's all I have. Have a nice day,
Regards,
Ruben A. Hilbers (aka @Dantes74302 on X)