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In the timely words of Myitt and her friends...*nerd love*
I definitely enjoyed that! I love seeing that you have a back story to your characters!
The Alliance is quite a rarity actually. It was founded in another universe on October 17, 2000. It was founded by a 5 year old boy(Long story)with the intelligence of one of the most advanced species in the Milky Way - the Reptilinod. It's hard to explain, but suffice it to say that's precisely because he was half Reptilinod.
Anyway, with his brain-power, he was able to create a Time machine. He wanted to save his parents from the fire that killed them. In the end he painfully decided against it because if he saved them, it would ruin the amazing thing that he'd done — built the first actual time machine. And at 4 years of age no less.(Mary-Sue much? No worries, he's not like that any more. He's Caleb, my charie in Free-for-All. He used to be Omnipotent because of a camouflage-pill he accidentally exposed to some kind of radiation to make it SUPERPILL! lol. Mary-Sue overload...) so he went back to his life.
He created his first starship, the SS Scimitar. Back then there was no Alliance, nothing like that. Just the human race to guide along their path to interstellar flight. So nothing changed much. Until AFTER the Yeerk war.
Then, knowing alien races existed, he invented the SETI box; a small box 1/500th the size of a SETI radio telescope, but a hundred times more powerful. Scanning, he discovered the existence of the Clangst, the Flurat, the Cansrians, etc. Fastforwarding time, fastforwarding time...ah yes, here we go.
So now there were many threats in the Galaxy. A new cyborg race had shown up. Many species from closer to the Galactic Core were aggressive(They are now known as the Core Aggressors). And a few other threats. So, Caleb tried to get a bunch of species to create a bond of protection and mutual scientific benefit. It ended up being eight races — Human, Andalite, Hork-Bajir, Clangst, Remlan, Zyls, Flurat, and Cansrians(The last two had been enemies for a Long time.).
With so many species working together to explore the galaxy and protect the Alliance, Caleb decided others would need starships. The SS Scimitar was handed off to someone, now as the GAI Scimitar(Galactic Alliance Influence), and the Scimitar class starship was mass produced. Caleb created a new ship for himself, the GAI Explorer, a much larger ship with two separable sections. Eventually he didn't want such aarge starship, so that went the way of the Scimitar, being mass produced and replaced by the GAI Diplocaulus.
Fastforwarding time, fastforwarding time...okay, so much much later, the Diplocaulus is pretty much obsolete. Now Caleb captains the mighty, "Android Starship" UAI Prodigy. It I'd the only sentient starship in Astrofleet. But all the others have extremely sophisticated computers too, because Caleb is a Mary-Sue. HEY THAT RHYMES!!!
I hope you found this rant enjoyable and informative.