Legend of the Galactic Heroes/Ginga Eiyuu Densetsu

Song info:
Name: Must Be Something
Performance: Konno Hitomi
Lyrics and composition: Himeno Shinya
Arrangement: Kawabe Shin (credited as Kazato Shinsuke)

Summary:
For decades, the Galactic Empire has been locked in an interstellar war with the Free Planets Alliance, a conflict that involves thousands of spaceships and millions of soldiers on both sides. Two new commanders enter the conflict with great hopes: Imperial Admiral Reinhard von Lohengramm and the FPA's Yang Wen-Li. As they deal with superiors and subordinates, maneuver through complicated political arrangements, plot strategies, and win battles, each will be tested, and ultimately, changed, by the reality of war.