Operating Being_in_operation as the extreme southern flank of the Pusan Perimeter , the US 25th Infantry Division placed Placing its regiments around the South Korean city of Masan , with the 24th Infantry Regiment and 5th Regimental Combat Team based in Haman and nearby Sobuk-san , and the 35th Infantry Regiment based along the Nam River to the west of the city .

However , the 24th Infantry performed Hold very poorly at the battles Hostile_encounter of Blue Mountain and Haman , forcing Causation the 25th Division to muster reserves to counter the KPA gains against the 24th .