Milky Way Empire!

A new homes constructed by over a million giant battleships to keep the original inhabitants in hostage.

A few giants stood at the top of this universe, looking down at everything without expression, showing no sign of joy or sadness.

"The dark matter wave resonance has ended. In the Milky Way, 106,485 places have reacted. We just don't know how many intelligent beings have left their homes..."

"Send ships to issue the notice, and take the converters with them..."

Soon, more than a hundred thousand ships, each two thousand kilometers long, left this black hole space, flying to various parts of the Milky Way.

..

Solar System.

The fleets of the five civilizations dared not linger after the giant battleships was gone. They swarmed into wormholes, some choosing to go to Proxima Centauri, others to an unknown galaxy three hundred light-years away.

Some of the fleet returned to Proxima Centauri and found the place was empty.