遵义会议
In September 1930, his forces merged into the Third Corps of the Red Army's First Army Group and he became the staff of 9th division of Third Corps. In 1933, he became the head of the 4th regiment, 2nd division of the Red First Front Army. On 10 October 1934, he embarked on the Long March as the pioneer of 2nd division and, in the beginning of 1935, seized a critical military fortress at Loushanguan in Guizhou Province. As a result, he was promoted to the chief of staff of the 1st division of Red 1st Front Army after Zunyi Conference. After arrival in northern Shaanxi, he was severely wounded in combat. In 1936, he graduated from the Counter-Japanese Military and Political University and was appointed the chief of staff of the Fourth Corps of the Red Fourth Front Army. The Fourth Corps had just arrived in northern Shaanxi having been commanded by Zhang Guotao, and Geng took control of the unit.