Answer: The Nanjing Massacre
Explanation: Because it was a mass murder
<span>The sinking of the Cunard ocean liner RMS Lusitania occurred on Friday, 7 May 1915 during the First World War, as Germany waged submarine warfare against the United Kingdom who had implemented a naval blockade of Germany. The ship was identified and torpedoed by the German U-boat U-20 and sank in 18 minutes. The vessel went down 11 miles off the Old Head of Kinsale, Ireland, killing 1,198 and leaving 761 survivors.</span>
Purchasing indulgences got family out of purgatory.
Indulgences were a piece of paper a person would buy from the Church which would get family out of purgatory. Purgatory is the place between heaven and hell.
Many would spend their last coin on an indulgence to free a family member or themselves from purgatory. It was a money making scheme that would be criticized by Martin Luther.