コッソル水道
After replenishing at Manus early in November, "Columbia" returned to Leyte Gulf to protect reinforcement convoys from air attack. In December, operating from Kossol Roads in the Palaus, she covered Army landings on Mindoro, and on 14 December, lost four of her men when a gun misfired during an air attack. These were "Columbia"s first casualties of the war.