[No System + Border Army + Online IQ + Decisive Killing] In the northern border of Dashuo, there are three hundred people on the military roll of Gufeng Fort, but only seventeen are left alive. Shen Li, a soldier who surveyed the road, was ordered to enter the city to deliver military orders. Only when he entered the gate did he find that the food and wages had been swallowed up, the beacon fire was cut off, and reinforcements would not come. The military order did not ask them to defend the city, but asked everyone who knew the fake military register to die in the city. Three days later, Mo Ting's cavalry pressed on the border. Seventeen people, an isolated city, no food, no arrows, no help. Shen Li had no system and no magic weapons. He could only rely on terrain, discipline, intelligence and fate to drag the enemies to death under the city one by one. Defending this city is only the first step. Next, he would search up the devoured military rations to make the people hiding in the military camp and court understand: these seventeen lives are not a number that they can just fill in the military register. "If the reinforcements don't come, we will have to live on our own." "When the lone city is defended, it will be their turn to be afraid."