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The next morning, 19 August, marines and 34th Infantry troops met at the Naktong. Prisoners captured that morning said most of the North Korean survivors had crossed the river during the night. By afternoon, patrols to the river found no enemy troops. The (first) battle of the Naktong Bulge was over. [17-81]
The N.K. 4th Division lost nearly all its heavy equipment and weapons in the first battle of the Naktong Bulge. The Marine ordnance section, which gathered up most of the destroyed or abandoned enemy heavier weapons, recovered 34 enemy artillery pieces, 18 of them lined up along the Yŏngsan-ni,-Naktong River road for supporting fires along the main axis of enemy attack. The largest enemy artillery piece was 122-mm. in size. The North Korean casualties in this battle were heavy. The 24th Division buried more than 1,200 enemy dead. According to prisoners captured at the end of the battle, each of the three rifle regiments of the N.K. 4th Division had no more than approximately 300 to 400 men left after they re-crossed to the west side of the river. These prisoners said that about one-half their wounded died for lack of medical care. The entire 4th Division reportedly numbered about 3,500 men on 19 August at the end of the bulge battle. [17-82]
After the Obong-ni battle ended, a count of enemy weapons destroyed or abandoned there reportedly included 18 heavy machine guns of Russian or American manufacture, 25 light machine guns, 63 submachine guns of Russian or American manufacture, 8 antitank rifles, 1 3.5-inch rocket launcher, and quantities of ammunition and grenades. Included in the captured enemy equipment was a U.S. Army radio, SCR300, in good operating condition, set to the frequency of the 1st Battalion, 5th Marines. This indicated that the enemy had been intercepting conversations between A and B Companies the night of 17-18 August and probably had known precisely their locations and dispositions. [17-83]
The destruction, for all practical purposes, of the N.K. 4th Division in the battle of the Naktong Bulge was the greatest setback suffered thus far by the North Korean Army. The 4th Division never recovered from this battle until after the Chinese entered the war and it was reconstituted.