Five hundred years ago, Rudolf von Goldenbaum united the disparate governments of humankind and established a mighty human empire, a tribute to his own greatness that stretched across the galaxy. Demanding loyalty and discipline, Rudolf created an order designed to long outlast his own rule; but all human works fade in time. Today, the decaying empire faces the threat of the Free Planets Alliance, and military leaders on both sides jockey for power in the face of a seemingly inevitable conflict. On the side of the empire, the young general Reinhard von Lohengramm sees war as opportunity, and the empire as soft clay ready for his own sculpting. On the side of the alliance, would-be historian Yang Wen-li would like nothing better than to live out his days in peace - but times of war have little use for men who waste their days studying the mistakes of the past. Circumstances will make heroes and villains of both these men, as they write new history one blood-splattered page at a time.

The story revolves around Ryouko Yakushiji, a 27-year-old multilingual investigator that graduated from Tokyo University's elite Department of Law, and the bizarre cases she faces while working for the Tokyo Metropolitan Police. Yakushiji not only has to deal with supernatural beings in her line of work, but also her rival Yukiko Muromachi, another equally talented and beautiful police investigator.
(Source: ANN)

From MangaHelpers:

This is a new manga of the story of Legend of Galactic Heroes. It tells the story of a distant future within the Milky Way Galaxy, where the Galactic Empire and the Free Planets Alliance are constantly at war. The story begins with the young Reinhard von Müsel, a boy in the Galactic Empire that lives with his drunk father and his beautiful sister Annerose. He becomes close friends with the boy next door, Sigfried. After his sister is taken to become the Kaiser's concubine, young Reinhard is determined to take down the Empire in order to rescue her. He and his loyal friend Sigfried join the military academy together as the first step in Reinhard's plan. [tethysdust]

Victim of treachery, the army from the prestigious kingdom of Parse is defeated by its traditional enemy, the Lusitania. Its capital, Ecbatana, falls victim to the flames. Alone Arslan, the young heir to the throne, Daryoon, a general who remained loyal, and Narsus, an ex-military strategist retired with his disciple Elam, managed to escape. They will soon be joined by Gieve, a wandering minstrel, Alfreed, heiress to the country of thieves who is infatuated with Narsus, and the beautiful Pharangese, priestess devoted from her birth to the protection of Arslan.
Committed to reclaiming his throne, Arslan will have to fight the Lusitanian invaders and the one who proclaimed himself the only legitimate heir: Hermes, the knight of the silver helm. Thus begins a long and sore struggle for Arslan, a young man who has disliked war for all of his fourteen years, but who nonetheless will aim to free his country from slavery and and shatter the collar shackle of aristocracy...
(Source: M-U)