On 15 February when the British surrendered at Singapore, the Japanese pincers closed on Java. A fleet of 41 transports originating at Jolo in the Philippines were heading straight down the Makassar Strait and, after a single stop at Balikpapan, moved out across the Java Sea. A second fleet, even larger, was coming down out of the China Sea around the western curve of Borneo against Batavia and Western Java. The men on the bomber fields in Java received the news of Singapore's surrender as forewarning of their own defeat. Attacks were flown against the fleets heading towards Java, but the Joint Army-Navy Assessment Commission credited the Army airplanes of all Allied Air forces in the theater with no more than three minesweepers, four passenger or cargo vessels, and one converted salvage vessel sunk, and a part in the sinking of two other cargo vessels.