The Vorcent arrived in our solar system centuries ago.
They’ve been quietly mining the asteroid belt for construction material and fuel.
Only now, we’ve been able to detect them.
And, I suppose, launch rockets that might pose a threat to them.
So, they sent a delegation, introduced themselves, and offered to help us in exchange for mining rights.
We signed on the dotted line.
Soon after, a Vorcent Planetbuster shattered the moon, and harvester units collected up the useful minerals.
“Should have read the fine print,” said the Chief Negotiator, as another Planetbuster turned towards Earth. “Nothing personal, mind you.”