sentences:  The Nationalists planned to use the mountain as a guerilla base to launch operations against their Communist enemy.In mid-January 1950 the 141st Division of the communist 47th Army was tasked with the extermination of the Nationalist guerrillas and the division began its intensive training in mountain warfare.Two regiments of the 141st Division of the 47th Army were deployed in the regions of Neixipeng (内夕棚), Greater Rocky Gate (Dayanmen, 小岩门) and Lesser Rocky Gate (Xiaoyanmen, 小岩门), thus completing the encirclement of the Eight Sided Mountain (Bamianshan, 八面山).