Scorched earth
A scorched-earth policy is a military strategy that aims to destroy anything that might be useful to the enemy while it is advancing through or withdrawing from a location. Any assets that could be used by the enemy may be targeted, for example food sources, water supplies, transportation, communications, industrial resources, and even the locale's people themselves.
Endgame (Babylon 5)
With the Earth fleet disrupted, Sheridan's fleet easily bypasses it and reaches Earth's orbit. Sheridan broadcasts that they seek President Clark to be removed from office. Clark instead activates the Earth defense grid in a "scorched earth" strategy, targeting the satellites' missiles at both Sheridan's fleet and Earth, an action that would destroy nearly half of the planet. Clark then commits suicide. Senator Crosby informs Sheridan of Clark's death and the situation. Sheridan's fleet, along with help from the ships of the Non-Aligned Worlds, destroy most of the satellites. But one remains active, and only the damaged "Agamemnon" is nearby. Sheridan issues orders to ram the satellite but just then the "Apollo" jumps in and Lefcourt has his guns destroy the satellite. Lefcourt thanks Sheridan for doing the right thing though warns him he will likely face a tribunal.