Crest of the Stars (Japanese: 星界の紋章 Seikai no Monshou) is a trilogy of space opera (some parts could classify as military science fiction/military space opera) science fiction novels written by Morioka Hiroyuki. Beginning in 1999, the novels were adapted into anime series, the first of which ran for 13 episodes on WOWOW. There are three sequel series to the anime -- Banner of the Stars (13 episodes, aka Seikai no Senki), Banner of the Stars II (10 episodes, aka Seikai no Senki II) and both adapting the second novel, two recap movies -- Crest of the Stars Special Edition and Banner of the Stars Special Edition, and an OVA Crest of the Stars Lost Chapter (aka Seikai no Dansho). The fourth anime series, adapting the third novel, Banner of the Stars III (aka Seikai no Senki III) is an OVA released in Japan in 2005.

Crest of the Stars and Banner of the Stars (series I and II) follow Ghintec Linn (aka Jinto Lynn), a young prince whose world is taken over by the space-dwelling race of the Abh. When Ghintec was a young boy, his father, Rock Lynn, under threat of invasion, handed over their world, Martine, to the Abh in exchange for a position within Abh society. Young Ghintec is sent off to school to learn the ways of Abh nobility and the story of Crest of the Stars picks up as he meets the young Abh princess, Lamhirh (aka Lafiel) as they are about to travel to military school for Ghintec's further training.

However, in the midst of their travels, Lamhirh and Ghintec (along with the Abh ship Gothlauth, aka Gosroth) find themselves at the very beginnings of a war between the Abh Empire and the Four Nations Alliance of humankind - an anti-Abh alliance of the democratic nations of the United Mankind, the Federation of Hania, the Republic of Greater Alcont, and the People's Sovereign Union of Planets - a conflict with strong overtones of the Peloponnesian War between Sparta and Athens.

The series -- both the anime and novels -- are particularly notable for the fact that Morioka created for them an entire language, Baronh (and an accompanying alphabet, Ath), which the Abh speak, read, and write. Almost all written text in the anime is in Baronh, with occasional text in other (invented) languages; at least one planet is shown to have adopted Ath to write their own language (although this is not a plot point, and easily missed).

Crest of the Stars was released in Japan in 1999 and in the United States by Bandai in 2001. At the end of 2002, TechTV announced that Crest of the Stars was to be one of the initial titles as part of their new Anime Unleashed programming and began broadcast at the end of 2002 and through 2003.

From Wikipedia