December 1, the Russians had successfully counterattacked. Still retaining the authority to replace Nogi if necessary, Kodama assumed temporary command of the Japanese front-line forces, but officially maintained the despondent Nogi in nominal command. The battle continued throughout the following days with very heavy hand-to-hand combat with control of the summit changing hands several times. Finally, at 10:30 on December 5, following another massive artillery bombardment during which Russian Colonel Tretyakov was severely wounded, the Japanese managed to overrun 203 Meter Hill, finding only a handful of defenders still alive on the summit. The Russians launched two counter-attacks to retake the hill, both of which failed, and by 17:00, 203 Meter Hill was securely under Japanese control. For Japan, the cost of capturing this landmark was great, with over 8,000 dead and wounded in the final assault alone, including most of the IJA 7th Division. For Nogi, the cost of capturing 203 Meter Hill was made even more poignant when he received word that his last surviving son had been killed in action during the final assault on the hill. The Russians, who had no more than 1,500 men on the hill at any one time, lost over 6,000 killed and wounded. Destruction of the Russian Pacific fleet With a spotter on a phone line at the vantage point on 203 Meter Hill overlooking Port Arthur harbor, Nogi could now bombard the Russian fleet by heavy Howitzers with 500-pound (~220 kg) armor-piercing shells. He started systematically sinking the Russian ships within range. On December 5, 1904, the battleship Poltava was sunk, followed by the battleship Retvizan on December 7, 1904, and the battleships Pobeda and Peresvet and the cruisers Pallada and Bayan on December 9, 1904. The battleship Sevastopol, although hit 5 times by the howitzer shells, managed to move out of range of the guns. Stung by the fact that the Russian Pacific Fleet had been sunk by the army and not by the Imperial Japanese Navy, and with a direct order from Tokyo that the Sevastopol was not to be allowed to escape, Admiral Togo sent in wave after wave of destroyers in six separate attacks on the sole remaining Russian battleship. After 3 weeks, the Sevastopol was still afloat, having survived 124 torpedoes fired at her while sinking two Japanese destroyers and damaging six other vessels. The Japanese had meanwhile lost the cruiser Takasago to a mine