The Crusades are a war based in Kusha over territory and religion. The main participants are Brittannia, led by Alexander the Great in an attempt to reclaim the Holy Land, and Kusha, lead by the dreaded Emperor Kanishka. Brittannia employs, for the first time, Mercenary groups to fight in battle with them due to Kusha's size in military. One of said Mercenary groups happens to be Akihiro's Band, the Antagonist organization of the storyline.