On December 5, Chiang Kai-shek paid a visit to a defensive encampment near Jurong to boost the morale of his men but was forced to retreat when the Imperial Japanese Army began their attack on the battlefield. On that day the rapidly moving forward contingents of the SEA occupied Jurong and then arrived at Chunhuazhen, a key point of Nanking's outer line of defense which would put Japanese artillery in range of the city. Here China's 51st Division flung its main force into the fighting and repeatedly repulsed Japanese attacks before cracking on December 8 when the main force of the SEA arrived. The SEA also took the fortress at Zhenjiang and the spa town of Tangshuizhen on that day. Meanwhile, on the south side of the same defense line, armored vehicles of Japan's 10th Army charged the Chinese position at Jiangjunshan and Niushoushan defended by China's 58th Division. Valiant Chinese soldiers armed with hammers jumped onto the vehicles and banged repeatedly on their roofs shouting "Get out of there!", but after darkness fell on the battlefield the 58th Division was finally overwhelmed on December 9 after suffering, according to its own records, 800 casualties.