Knowing it would be impossible to defeat an armed Drona, Krishna suggested the Pandavas a plan to disarm their teacher. His idea was that Bhima first kill an elephant named Ashwatthama, and then claim to Dronacharya that he has killed Dronacharya's son with the same name. After killing the elephant, Bhima loudly proclaimed that he had killed "Ashwatthama". Disbelieving him, Drona approached Yudhishthira, knowing of Yudhishthira's firm adherence to Dharma and honesty. When Dronacharya asked for the truth, Yudhishthira responded with the cryptic "Ashwatthama is dead. But the elephant and not your son." Krishna also knew that it would be impossible for Yudhishthira to lie outright. Under his instructions, the other warriors blew trumpets and conchs, raising a tumultuous noise in such a way that Dronacharya only heard that "Ashwatthama was dead", and could not hear the latter part of Yudhishthira's reply. In other versions of the story, it is told that: Drona, in grief, simply does not process the final part of Yudhishthira's statement.