"The Yang's Saga", takes place during the Northern Sung Dynasty (960 - 1127 AD). During this period China was under constant attack from many nomadic tribes. Although a thriving economy the Northern Sung Dynasty never possesed any great military strength. To end a number of wars against the invading tribes, the Sung Dynasty were often forced to sign peace treaties. "The Yang's Saga", focuses on the war between the fierce Kithan warriors from the Liao Dynasty taking place around 1017 AD. The first of a number of wars which eventaully led to the the Jurchain invasion from the North and forced the Sung Dynasty to the South.