sentences:  Since the Earth ships could not jump away (due to an accidental side effect of the powerful Minbari scanners, which prevented Earth jump engines from working) and the human fleet commander was known to handle first contact situations rather badly, the humans believed that the Minbari were about to attack; they misinterpreted the Minbari gesture and opened fire.Dukhat was killed in the exchange, his death witnessed only by a grieving Delenn, whom Dukhat had trained.Delenn swore vengeance against the humans who had killed her master, and cast the deciding Council vote that began the Earth-Minbari War.