The war between the Human Race and the Star Spirit Race did not spring any surprises.
The Star Spirit Race was already deeply divided due to the Last Star God Emperor's actions in the Star Lord Assembly, especially after the Star Lord Assembly's victory, which led to numerous Heavenly Emperors and Holy Emperors departing the Star Spirit territory and wandering the Star Realm.
The remaining Heavenly Emperors only appeared to obey the Star Lord Assembly superficially, doing everything in their power to resist behind a façade of compliance.
Given enough time, the Star Lord Assembly would naturally have been able to deal with these defiant Heavenly Emperors and Holy Emperors. However, the problem was that the Star Lord Assembly collapsed too rapidly.
