Conversation so far:
what was imperial in regard to cassandra nova ?
Imperial Guard.
what was the imperial guard for?
Cassandra also made Lilandra send the Shi'ar Imperial Guard to wipe out the mutant population of Earth, starting with the X-Men.

Question: was this successful?
Self-contained rewrite: Was the sending of the Shi'ar Imperial Guard to wipe out the mutant population of Earth successful?