The flight was formed in February 1945 to support the Allied Intelligence Bureau (AIB) and saw action over Borneo and the Netherlands East Indies (NEI) from March that year until the end of the war in August.

[4] The flight was controlled by the AIB and was tasked with the insertion and supply of intelligence gathering parties behind Japanese lines.

The main changes were the removal of the mid-upper and ball turrets and all armour plate, the replacement of the normal radar with a Rebecca radio set and the installation of a slide at the rear of the aircraft to drop personnel and supplies.

Despite the priority accorded to the unit, it experienced shortages of equipment and its accommodation and maintenance facilities at Leyburn were basic.

On that day three B-24s (A72-191, A72-159 and A72-192) departed Leyburn for McGuire Field in Mindoro, where they arrived on 18 March, via Darwin and Morotai.

[7] The two remaining Australian Liberators and United States Navy aircraft searched for this B-24 for two days, but did not locate its wreckage and returned to Leyburn on 30 March.

200 Flight continued to support Z Special Unit's operations (designated 'Semut 1') around Bario for the next few months, and eventually flew in 30 of the 42 personnel involved.

It subsequently flew over 30 operations to drop AIB personnel and supplies in Borneo, Ambon, Lombok, Sumatra and Timor.

200 Flight lost a further two B-24s in these operations; one was possibly shot down over Timor on 17 May and the other crashed either in or off the coast of north Borneo on or about 21 May.