read this Ultra intelligence in the office of the Supreme Allied Commander, South West Pacific Area – General Douglas MacArthur – on 25 February. The prospect of an additional 6,900 Japanese troops in the Lae area greatly disturbed MacArthur, as they might seriously affect his plans to capture and develop the area. Kenney wrote out orders, which were sent by courier, for Brigadier General Ennis Whitehead, the deputy commander of the Fifth Air Force, and the commander of its Advance Echelon (ADVON) in New Guinea. Under the Fifth Air Force's unusual command arrangements, Whitehead controlled the Allied Air Forces units of all types in New Guinea. This included the RAAF units there, which were grouped as No. 9 Operational Group RAAF, under the command of Air Commodore Joe Hewitt. Kenney informed Whitehead of the proposed convoy date, and warned him about the usual Japanese pre-convoy air attack. He also urged that flying hours be cut back so as to allow for a large strike on the convoy, and instructed him to move forward as many aircraft as possible so that they could be close to the nearby captured airfields around Dobodura, where they would not be subject to the vagaries of weather over the Owen Stanley Range. Kenney flew up to Port Moresby on 26 February, where he met with Whitehead. The two generals inspected fighter and bomber units in the area, and agreed to attack the Japanese convoy in the Vitiaz Strait. Kenney returned to Brisbane on 28 February. Allied tactics In the South West Pacific, a conventional strategic bombing campaign was out of the question, as industrial targets in Japan were well beyond the range of even the largest strategic bombers operating from bases in Australia and New Guinea. Therefore, the primary mission of the Allied bomber force was interdiction of Japanese supply lines, especially the sea lanes. The results of the effort against the Japanese convoy in January were very disappointing; some 416 sorties had been flown with only two ships sunk and three damaged; clearly, a change of tactics was in order. Group Captain Bill Garing, an RAAF officer on Kenney's staff with considerable experience in air-sea operations, including a tour of duty in Europe, recommended that Japanese convoys be subjected to simultaneous attack from different altitudes and directions. The Allied Air Forces adopted some innovative tactics. In February 1942, the RAAF began experimenting with skip