Small Japanese Defence Force present in the captured Dutch East Indies according to the U.S. Joint Intelligence Committee. Daily summary dated 18 May 1942

An item reported that just a small Japanese so-called Defense Fore remained in the Dutch East Indies probably dealing with consolidation of their achievements and invading the outlying islands of the archipelago. Furthermore it seemed that the Japanese obtained oil from the Borneo oil fields at Miri (1) and Tarakan(2).

Notes

1. In fact British Borneo [Serawak], on 8 December 1941 were the oil- and airfields there destroyed.

2. The oil wells and refineries of Tarakan were crucial for the Japanese forces and was attacked on 11-12 January 1942. The Dutch government understood the importance and intended to defend Tarakan against all costs or at least demolishing the oil-production; the latter was successfully executed. Japan however captured the island and possessed it until May 1945.  

Source

Map Room Papers (Roosevelt Administration), 1942 - 1945. U.S. Joint Intelligence Committee. Daily summary No. 159 dated 18 May 1942