 By January 1942, parts of Sulawesi and Kalimantan were under Japanese control.By February, the Japanese had landed on Sumatra where they had encouraged the Acehnese to rebel against the Dutch.On 19 February, having already taken Ambon, the Japanese Eastern Task Force landed in Timor, dropping a special parachute unit into West Timor near Kupang, and landing in the Dili area of Portuguese Timor to drive out the Allied forces which had invaded in December.