When Humanity reaches the stars, it finds freedom. But soon it finds others...

Humanity, one with the stars. After wars and centuries of strife to its own people it found wonder within the stars above.
Generations of explorers, all wishing to see the universe in whole. Hundreds of worlds claimed and humanity found itself spread. Changing and becoming something new.
Humanity made new homes, bloomed and found new issues to face. Issues of scale, as when everyone wants to explore the stars... How many remain at home to make what people need?
A problem made only worse by faction infighting. Claims of better ways to live, and people wishing to dictate rule on those around them.
But that sort of thing changes when disaster makes its way into sight.
The truest disaster of all...
A world cracked in two, split like an egg. A face put to those who dwell in the void. A reason to unify...
If the first foes they encounter can crack a planet after all... What else can they do then prepare for war?