Marblehead and other American warships then joined with those of the Royal Netherlands Navy and the Royal Australian Navy to patrol the waters surrounding the Netherlands East Indies and to screen Allied shipping moving south from the Philippines. On the night of 24 January 1942, Marblehead covered the withdrawal of a force of Dutch and American warships after they had attacked, with devastating effect, an enemy convoy off Balikpapan. Six days later, in an attempt to repeat this success, the force departed Surabaja, Java, to intercept an enemy convoy concentration at Kendari. The Japanese convoy, however, sailed soon after, and the Allied force changed course, anchoring in Bunda Roads on 2 February. On 4 February, the ships steamed out of Bunda Roads and headed for another Japanese convoy sighted at the southern entrance to the Makassar Straits. At 09:49, 36 enemy bombers were sighted closing in on the formation from the east.
