tyb
''Celebration of a Jewish Massacre''
Later that evening, Ahasuerus and Haman attend Esther's second banquet, at which she reveals that she is Jewish and that Haman is planning to exterminate her people, which includes her.
Ahasuerus becomes enraged and instead orders Haman hanged on the gallows that Haman had prepared for Mordecai.
The previous decree against the Jewish people could not be nullified, so the King allows Mordecai and Esther to write another decree as they wish. They decree that Jewish people may preemptively kill those thought to pose a lethal risk.
As a result, on 13 Adar, 500 attackers and 10 of Haman's sons are killed in Shushan. Throughout the empire 75,000 of the Jewish peoples' enemies are killed.[18] On the 14th, another 300 are killed in Shushan. No spoils are taken.[19]
https://en.wikipedia.org/wiki/Purim