Three years have passed since the Four Nations Alliance declared war on the Abh Empire. With both sides decimated by the first encounter, the lull in violence has provided enough time to build fleets massive enough to span the entire galaxy. Just before the Abh complete preparations for their conquest, however, the Alliance launches a pre-emptive strike, forcing them to take the defensive. Now in command of her own ship, Lafiel is assigned to the fleet as a destroyer captain, and eagerly awaits the opportunity to prove herself as a true Abriel. But when a new class of enemy ship appears on the front lines, the tides quickly turn for the worse. With her vessel now little more than cannon fodder, her dreams are turned into a desperate race for survival - can she and her crew survive amidst a battlefield of endless death and destruction?
It is the year 2356 AD, 189 years after a shockwave from a distant supernova decimated the Earth. Since that fateful day, humanity has begun training for a final mission to protect the planet from the inevitable oncoming 2nd shockwave - a mission whose failure means the annihilation of mankind. For Katase and her friends, their training at the foundation Stellvia is just the beginning of an adventure that could lead to saving the world, or seeing its end...
In a far and distant future, men and women have become mortal enemies. Each living on seperate planets, an interstellar war is being fought between the two very different peoples. Hibiki, a mere 3rd class worker, finds himself in the middle of a huge space battle, facing the nemesis of mankind: Womankind!
Banner Of The Stars and Vandread focus on large battles in space, following a main protagonist fighting alongside people who others would have considered their enemies. Both series also seem to have a romantic subplot. But if you like space operas/battles then check these out.