Imperial Ghosts

Humanity's first empire collapsed centuries ago, but two tiny shards kept the ability to travel across the stars at faster than light speeds: the Wyvern Hegemony and the Republic of Lyonesse.
Each considers itself the heir of the old empire and swore an oath of reunification. Yet only one can rule over humanity reunited. As they race to absorb ruined human worlds and rebuild them in their respective image, it is only a matter of time before they encounter the ghosts of what once was.
And those ghosts will demand their due.