Description: 783 aircraft - 326 Lancasters, 202 Halifaxes, 143 Wellingtons, 99 Stirlings, 13 Mosquitos. The Pathfinder marking plan proceeded excellently until an Oboe Mosquito inadvertently released a load of target indicators 14 miles north-east of the target area. This caused part of the Main Force to waste its bombs on open country. But the main bombing caused extensive damage in the centre of Düsseldorf, where 130 acres were claimed as destroyed, and this proved to be the most damaging raid of the war for this city. 38 aircraft - 14 Lancasters, 12 Halifaxes, 10 Wellingtons, 2 Stirlings - lost, 4.9 per cent of the force.