At the northern border of the Great Xia Dynasty, conscript Li Guo unexpectedly activates the Military Achievement System. Every time he completes a military feat such as “slay a hundred men,” “hold the pass for three days,” or “drill troops as effortlessly as moving your own arm,” he earns rewards including fragments of military treatises, a heavy black-iron sword, and secret techniques for breaking enemy formations. He rises from a low-ranking officer whose superiors have withheld his pay and rations to the “Ghost-Faced Commandant,” who launches a night raid on the Xiongnu royal court with eight hundred cavalry, and then to the General Who Pacifies the North, who lifts the siege of Yunzhou with a “fire oxen breach of the linked formation.” With the System's help, Li Guo not only uncovers the truth behind the false accusation that his father betrayed the country, but, as dynasties rise and fall, also uses military might to defend the realm. In the end, he is named Prince of Zhenbei and reshapes a century of warfare on the northern frontier. High-octane action from start to finish: tactical clashes on the battlefield, System-powered loot, underdog comebacks and face-slapping, and political schemes, all packed with satisfying twists.