On the night of 4–5 March 1942, Stuttgart endured its first large-scale attack, as 121 RAF bombers conducted a strategic bombing of the city to destroy the Bosch factory, which produced components for the Luftwaffe. Extremely dense cloud coverage of the city foiled the raid, and the flotilla's bombs were scattered over the city, though a decoy site at Lauffen am Neckar was hit. Not a single bomb struck the Bosch factory but 13 civilians were killed and 37 more were injured. One Stirling was lost. The next night, another 77 bombers marshaled against Stuttgart but again were troubled by poor visibility, as the city was obscured by haze. The closest bombs came was the Kraherwald to the west of the city, and three Wellingtons and another Stirling were lost. Another raid was launched on the night of 6–7 March containing 97 aircraft, but the crews again couldn't identify Stuttgart and instead attacked the Lauffen decoy, which may have led the flotilla to Heilbronn, away, where seven civilians were killed and more than 150 buildings were destroyed.