Also on Nanking's eastern side but further south, other units of the SEA faced the difficult task of fording the large moat standing between them and three of the city gates, Zhongshan Gate, Guanghua Gate, and Tongji Gate, though the speed of Japan's earlier advance played in their favor as key Chinese units slated to be deployed here were not yet in position. That evening, Japanese engineers and artillerymen closing in on Guanghua Gate managed to blow a hole in the wall. A Japanese battalion launched a daring attack through the gap and planted a Japanese flag on a portion of the gate, but was immediately pinned down by a series of determined Chinese counterattacks. The Chinese brought up reinforcements, including tanks, and they poured down grenades and even flaming, gasoline-soaked lumber onto the Japanese battalion, which was only saved from annihilation by timely bursts of concentrated artillery fire from the rest of their division. The battalion succeeded in holding its position for the rest of the battle despite losing eighty of its eighty-eight men.