On the northern border of the Great Xia Dynasty, Li Guo, a garrison soldier, accidentally activated the "Military Achievement System". Every time he completed military achievements such as "killing a hundred men", "guarding the gate for three days", and "training troops like an arm", he would receive rewards such as fragments of the art of war, dark iron heavy swords, and formation-breaking secret techniques. From the low-level soldier commander who had his food and salary deducted by his superiors, to the "ghost-faced captain" who attacked the Huns' court at night with 800 cavalry, to the Zhenbei general who used the "Fire Bull Breaking Chain Formation" to break the siege of Yunzhou, with the support of the system, Li Guo not only uncovered the truth about his father's unjust case of "collaborating with the enemy", but also used military methods to control the country when the dynasty changed, and was finally awarded the title of "Zhenbei King", rewriting the pattern of centuries of war in northern Xinjiang. The whole process is high-energy: battle of wits on the battlefield, system explosion, counterattack and slap in the face, and tactics to break the situation are all interlocking, and the excitement is intensive.