The Mobile Brigade, which began forming in late 1946 and was used during the anti-Dutch Revolution, started sending students for US Army SF training on Okinawa in January 1959. In April 1960 a second contingent arrived for two months of Ranger training. By the mid-1960s the three-battalion Mobile Brigade, commonly known as Brimob, had been converted into an elite shock force. A Brimob airborne training centre was established in Bandung. Following the 1965 coup attempt, one Brimob battalion was used during anti-Communist operations in West Kalimantan. In December 1975 a Brimob battalion was used during the East Timor operation. During the late 1970s, Brimob assumed VIP security and urban anti-terrorist duties. In 1989, Brimob still contained airborne-qualified elements. "Pelopor" ('Ranger') and airborne training takes place in Bandung and at a training camp outside Jakarta. Historically, Brimob wore the Indonesian spot camouflage pattern during the early 1960s as their uniform.