Plot
The game's story takes place in 1937 E.C, two years following the conclusion of Valkyria Chronicles, in which Squad 7 defeats Maximillian in Gallia and destroys the Marmota, ending the war between Gallia and the Imperial Alliance. In the wake of the revelation of Archduchess Cordelia's Darcsen heritage, a rebel group of dissatisfied aristocrats and like-minded soldiers and citizens calling themselves the Gallian Revolutionary Army led by Count Gilbert Gassenarl, his son Baldren, his daughter Audrey, and an armored figure named Dirk begins the Gallian Civil War to wage an ethnic cleansing campaign against Gallians of Darcsen descent.[11] However, with the intense fight against the Empire having left Gallia's regular army in an exhausted state, there is initially little to stop the insurrection from gaining momentum. Laws preventing the formation of a national militia to fight fellow Gallians force the government to deploy military academy cadets to the front lines in order to combat and defeat the GRA forces.
Among the students sent out on the field is 17-year-old Avan Hardins, a young man who enrolls in Lanseal Military Academy after his older brother Leon was reported dead during a special mission.[12] Avan is assigned to Class G, and he and his classmates are deployed on multiple missions in opposition to the rebels, who deploy artificial Valkyrur such as Dirk to combat them. Eventually, the rebels directly attack Lanseal and steal research data from Lanseal's abandoned old campus. During the battle, Dirk's helmet is knocked off, revealing him to be a corrupted Leon. In the aftermath, Avan confronts Lanseal headmaster Laurence Kluivert and discovers that he has been using Lanseal as a front to conduct unethical experiments on the students, including Leon, to create the artificial Valkyrur in order to protect Gallia. Despairing over the theft of the research data, Kluivert commits suicide. Meanwhile, the rebels seize control of the Gallian capital of Randgriz and arrest and imprison Cordelia. Gilbert declares himself Archduke, but when he declares his intention to join Gallia to the Federation, Baldren murders him and seizes control of the rebel army.
Audrey attacks Anthold Harbour, but is defeated and killed by Class G. Baldren decides to flee to the Federation for the time being and bide his time until he can strike again. At the harbour, Class G fights and mortally wounds Dirk, who reverts to his true personality of Leon and expires in Avan's arms. Class G then stops Baldren's escape by seizing control of his escape craft, the Federation battleship Dandarius. Cornered, Baldren uses the research data he has taken to turn himself into a Valkyrur. Class G kills him in a final battle, bringing an end to the civil war. Gallia starts to rebuild itself again. However, Lanseal Academy has to be closed due to the news of experimentation on students. Class G holds a graduation ceremony, and Avan declares that he will see his friends again in the future.