And the second method is much simpler.
Often, the living environment of a planet is particularly suitable, and it would be a pity to use it as a Battle of All Races, so the federation would contact the cleaning company and have them thoroughly clean up the planet.
On this planet, all living creatures with the power to resist would be exterminated.
And this process must be as environmentally friendly as possible, leaving no trash behind.
This means that large-firepower weapons cannot be used. Instead, ground forces must be sent to batch clean indigenous people, a process known as "trash sweeping."
The main company for this kind of project is the Cleaning Company.
After being cleaned up, these planets usually become vacation homes for rich businessmen or politicians.
