<human>:  When did the assassination of Lord Mountbatten of Burma take place?
<bot>: The assassination of Lord Mountbatten took place on the night of 26th of August, 1979. Lord Mountbatten was the second cousin of Queen Elizabeth II, and was the last Viceroy of India. He was assassinated by the Irish Republican Army, who were upset that he was allowing the British Army to remain in Northern Ireland.