system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40K] Is there any possible situation that would merit an exterminatus on Terra?
gpt
The Imperium would only consider that after exhausting the usefulness of everyone they had trying to defend Terra. Literally every man, woman, and child that can stand would be given to the imperial guard for orders and quick marksmanship training. Failing that, the Grey Knights would be called in from Titan of the threat was Chaos based, and the Adeptus Mechanicus would bring every war engine, tank, titan, and servitor they have to keep things running. If all of that fails, and the Golden Throne falls, then they would rather see Terra burned then in the hands of xenos.