临洮县
In the summer of 253, Jiang Wei led tens of thousands of Shu troops from Shiying (石營; northwest of present-day Xihe County, Gansu) to besiege Didao (狄道; around present-day Lintao County, Gansu). In response to the Shu invasion, the Wei regent Sima Shi ordered his generals Guo Huai and Chen Tai to lead the Wei forces stationed in the Guanzhong region to attack the invaders and lift the siege on Didao. Chen Tai attacked the Shu forces at Luomen (洛門; in present-day Wushan County, Gansu) and defeated them. Jiang Wei eventually withdrew all his forces and retreated back to Shu when they ran out of food supplies.