Three days prior to the start of Battleaxe, to help soften the Axis forces, the Royal Air Force was to bomb Benghazi while all aircraft capable of ground attack were to bomb Axis movement on the frontier. Once the battle began, fighters were to patrol defensively over Allied ground forces, while medium bombers were to stand by to engage Axis columns. Such was the priority on Battleaxe that Arthur Tedder (Air Officer Commander-in-Chief, Middle East) was instructed by the Chiefs of Staff to accept significant risks in other theatres by diverting all possible air support for it. Beresford-Peirse and Tedder established headquarters well to the rear, at Sidi Barrani and Maaten Baggush. Beresford-Peirse chose Sidi Barrani as, even though it was more than a five-hour drive from the battlefield, it was equipped with the most advanced airfield for reconnaissance aircraft and was also the most forward position from which communications could be maintained with Maaten Baggush.