The Imperial forces attacking the Alliance rear support base succeeds in breaking into the base headquarters, inflicting heavy damage to it. Reinhard von Müsel manages to capture the Alliance base commander, Sinclair Cerebrese, alive with some help from Siegfried Kircheis. They then return to where their fleet is stationed upon receiving retreat orders. Outside Van-Fleet 4-2, the battle between the Alliance and Imperial fleets rages on inconclusively and only ends near the end of April 794 UC when both sides decide to withdraw from the Van-Fleet Starzone entirely. For his efforts, Reinhard is promoted to the rank of Rear Admiral. His superior Vice Admiral Grimmelshausen and Hermann von Luneberg are also promoted by one rank. However, Kircheis is not promoted, which infuriates Reinhard.
Prequel to the original series, focusing on Reinhard and his steps up the chain of command in the Galactic Empire. Also focusing on the FPA's Yang Wen-li. A chronicle on how he earned the title "The Hero of El Facile" and his handling of assignments he received after the historic event. Spiral Labyrinth also continues with the background of Reinhard and Kircheis where the first Gaiden left off.
