He fought with courage and distinction for Feng Yuxiang in the Central Plains War, but when General Zhang Xueliang, Commander-in-chief of the Northeastern Border Defense Army, formerly known as the Fengtian clique declared himself for Chiang Kai-shek, the anti-Chaing forces were quickly defeated. Pang again switched sides and once again declared support for the Nationalist Government who appointed him as commander of the 40th corps. He participated in a number of actions against the Chinese Communist forces in Shaanxi province and defended North China against the Imperial Japanese Army invasion led by Field Marshal Baron Nobuyoshi Mutō in the Defense of the Great Wall. In 1935, General Feng Yuxiang and a number of his old colleagues were involved in the Actions in Inner Mongolia (1933–1936) against Japanese penetration of the region. Because President Chiang Kai-shek still held out hopes for a peaceful settlement with Japan. President Chiang sent War minister General He Yingqin to disband Feng Yuxiang's Chahar People's Anti-Japanese Army and named Pang Bingxun as Chairman of Chahar Province in order to appease the Japanese military leaders. The Nationalist Government made him a lieutenant general in 1936 and General Pang once again showed support for Chiang Kai-shek during the Xi'an Incident and subsequently joined the Second Sino-Japanese War next year.