寿县
In 257, when the Wei general Zhuge Dan started a rebellion in Shouchun (壽春; present-day Shou County, Anhui), Jiang Wei decided to take advantage of the situation to stage another invasion of Wei. He led Shu forces to attack the Wei garrisons near the Great Wall which were well-stocked with supplies but poorly defended. The Wei forces stationed there started panicking when they heard of the Shu army's approach.