The Battle of Guanzhong (关中战斗) was a battle fought between the nationalists and the communists during the Chinese Civil War in the post-World War II era and resulted in communist victory. In the southern front of the nationalist dominated region bordering the communist base in Shaanxi – Gansu – Ningxia, the communist controlled region in Guanzhong had formed a bulge that the nationalists had long planned to eliminate. The communist base in Guanzhong posed a serious threat to both Guanzhong and eastern Gansu, and also threatened the flank of the nationalist force in their planned attack on the communist capital, Yan'an. Nationalists had a total of two divisions, totaling six brigades in the region and decided to eliminate the communist base in Guanzhong first.