Battle of Megiddo!
The picture is specifically depicting the extremely successful strafing run the RAF carried out against a retreating Turkish army column.
''On the night of 20–21 September the Seventh Army began to evacuate Nablus.[71] By this time it was the last formed Ottoman army west of the Jordan and although there was a chance that Chetwode's XX Corps might cut off their retreat, its advance had been slowed by Ottoman rearguards. On 21 September, the Seventh Army was spotted by aircraft in a defile west of the river.
The RAF proceeded to bomb the retreating army and destroyed the entire column. Waves of bombing and strafing aircraft passed over the column every three minutes and although the operation had been intended to last for five hours, the Seventh Army was routed in 60 minutes.
The wreckage of the destroyed column stretched over 6 miles (9.7 km). British cavalry later found 87 guns, 55 motor-lorries, 4 motor-cars, 75 carts, 837 four-wheeled wagons, and scores of water-carts and field-kitchens destroyed or abandoned on the road.[72] Many Ottoman soldiers were killed and the survivors were scattered and leaderless. Lawrence later wrote that "the RAF lost four killed. The Turks lost a corps."
https://en.wikipedia.org/wiki/Battle_of_Megiddo_%281918%29