Kourou city once belonged to Wei, but was taken over by Qin. The lord of Kou Rou was a timid person.
Even as the lord was a timid person, they send in four generals and appointed them each at a wall to command. They were all famous generals in their own right and are all skilled at siege defence.
Kou Rou city was the first city the Mou Gou Army reached on the Sanyou Campaign. And it was conquered on 11th day of the siege thanks to the Gyoku Hou Unit breaching their eastern wall.
They had a large army stationed inside and had huge supply of arrows to rain down on the Qin people for weeks if not more. They also had a large amount of Archers to use them.
Kourou's East Wall Set Ablaze by the Gyoku Hou Unit
Kourou's East Wall has been attacked by Gyoku Hou Unit's Siege Tower
Kourou's East Wall has been attacked by the Gyoku Hou Unit