The first series covers volumes 1 and 2 of the original novels, adding some prequel stories (episodes 9 and 11) and original content (parts of episodes 13 and 14). The main theme is Reinhard von Lohengramm's rise to power within the Galactic Empire, mirrored by Yang Wen-li's unwillingness to go beyond his military duties and assume a similar position in the Free Planets Alliance.

The 28-episode second series covers volumes 3 to 5 of the original novels. With the overthrow of the Goldenbaum Dynasty and the defeat and occupation of the Alliance, Reinhard achieves almost all his goals. One of the main themes is the comparison between a corrupt democracy and an efficient dictatorship, and the moral difficulties of reconciling the two.

The 32-episode third series covers volumes 6 to 8 of the original novels.

The 24-episode fourth series covers volumes 9 and 10 of the original novels.