I wanna know what you guys think about this
"the Welkin Empire of Glamoth enjoyed a vast territory spanning tens of thousands of light-years"
The Iron Cavalry are genetically engineered warriors created by the Republic of Glamoth to fight against the Swarm. The Iron Cavalry consisted of short-lived genetically engineered humans who were created for the sole purpose of fighting the Swarm in armored suits called Strategic Assault Mechs...
honkai-star-rail.fandom.com
We'll just assume it's 10k light year, so
10000 light year = 94607304725800440000 meters
Now, 94607304725800440000/299792458 = 315 billion c value (MFTL+)
"Until one day, knights clad in mechanical armor descended from the sky and wiped out the sun-swallowing Swarm.
Since then, the silver-white iron knights have traveled to and from the various star systems in the empire, crossing the devastated territories and fighting back against the calamity that wiped out the galaxy. "