Banner of the Stars (星界の戦旗, Seikai no Senki, lit. Battle Flag of the Stars) is a Japanese series of science fiction novels written by Hiroyuki Morioka, which serve as a sequel to Crest of the Stars. Three novels in the series have been adapted into anime. The first series, Banner of the Stars (13 episodes, a.k.a. Seikai no Senki) was released in 2000 with a recap movie Banner of the Stars Special Edition following in 2001. That year, Banner of the Stars II (10 episodes, a.k.a. Seikai no Senki II) was also released. The third anime series, adapting the third novel, Banner of the Stars III (a.k.a. Seikai no Senki III) is an OVA released in Japan in 2005.