Complex sentence: Hitler, despite the complaints, ordered the bombing to continue, and Richthofen's force flew 450 sorties against Modlin, securing its surrender on 27 September after 318 tonnes of bombs had been dropped on it in two days.
Split into simpler sentences: Hitler, despite the complaints, ordered the bombing to continue. Von Richthofen's force flew 450 sorties against Modlin, securing its surrender on 27 September after 318 tonnes of bombs had been dropped on it in two days.