 The oiler then put to sea for the Borneo operation, sailing to Tawi Tawi for staging.From 21 to 25 June "Chepachet" was at sea under escort of fueling the bombardment group which carried out an intensive preparatory pounding at Balikpapan, Borneo and on 30 June, the oiler returned to Balikpapan for the assault the next day.She remained off the Borneo coast until 19 July, supporting the assault and occupation.