The Nanjing Massacre and Bataan Death March are pretty famous examples of rudeness. Couldn't it be argued that the USSR declaring war on them at the same time as the US dropped two atomic bombs on them are examples of arms curtailing rudeness?

Also TIL about the massacres of Korean civilians after the 1923 Great Kantō Earthquake: https://en.wikipedia.org/wiki/1923_Great_Kantō_earthquake#En...