Azur Lane: Carrier from Stars Beyond (Starblazer x Azur Lane)

[Note, the humanity where Main character comes from is not Earth, but entirely fiction]

Stars
A galaxy full of wonders and secrets waiting to be discovered by explorers
When humanity reaches for the stars
Leaving the warmth of their Home, Asteria
It started a new age of exploration for humanity exploring
When humanity discovered other habitable planets and found life
It started the age of Colonization as one colony turned to hundreds
Colonies then grow as more people turn outwards from Asteria to settle these new planets
Colonies then turns to cities that support more and more citizens as new industry were established
Soon however, governments begins to form in the colonies declaring independent from their old homes
This prompts the homeworld government, Mauser Galactic Empire, to suppress them with brutal force which then triggers a war that would devastate not only the colonies but their homeworld of humanity.
There was a fleet led by the named carrier after the first founder of the empire, MGS Karliana Mauser, but facing overwhelming forces by the colonies. It ultimately led to a devastating defeat which leads to the devastation of Asteria by the colonies. The mistake was soon realized by the colonies who wept seeing their homeworld origin devastated by their own hands.
This war had cost many lives and ships, such is the fate of MGS Karliana Mauser, the ship that is now a floating wreck in space.

Starblazer x Azur Lane are owned by their respective owners