As the size of the Communist forces grew and pressure grew from the Kuomintang, the Fourth Army was forced to move out. From January 14, 1929, the organisation moved to Ruijin, further south in Jiangxi province, where the Jiangxi Soviet was eventually set up. At the same time, the Kuomintang were executing another encirclement campaign, involving 25,000 men from fourteen regiments. Peng Dehuai was left in command of an 800-man-strong force, formerly the Fifth Army. By February, his remaining troops broke up under heavy attack from Wu Shang's Hunan troops.