Nagasaki was a city in Japan. It was hit by an atomic bomb in 1945, leading the Japanese to surrender, ending the Pacific War and the Second World War as a whole. (COMIC: Sky Jacks [+]Andy Diggle and Eddie Robson, Doctor Who (2012) (IDW Publishing, 2013).)
Ace listed the bombings of Hiroshima and Nagasaki as some of the terrible things her side did in the War. (PROSE: Timewyrm: Exodus [+]Terrance Dicks, Virgin New Adventures (Virgin Books, 1991).)