Nuke Planet
Destroy all buildings and units stationed on a planet as well as the portal, making it available for exploration again.

Week 23, year 0
Your agents reached their destination, the planet 10,9:3 owned by Evil Empire of family #3 to perform Nuke Planet.
Your agents successfully stayed undiscovered during the operation.
These are the results of the operation.
Place nuclear devices : succeeded, planet now uninhabited

(Note: results may vary depending on the size of your/enemy empire and your/enemy number of agents)