Assuming the user meant the Tatar genocide or the persecution in Tatarstan, I should suggest historical sources on that event. I'll need to verify the correct terminology and date. The 1933-1935 period in the Soviet Union involved mass purges, including the Tatars.

Tatarstan is a republic in Russia, historically home to the Tatar people. There was a conflict in 1933 known as the Kazan Purge or Tatar genocide where a significant number of Tatars were executed. Maybe the user is referring to that event, but the term "gangbang" here likely is a typo for "genocide" or another term.

Make sure to correct the spelling in the response, clarify possible misunderstandings, and provide a comprehensive list of resources without assuming prior knowledge. Also, consider the sensitivity of the topic and the user's intent—if it's for academic research or genealogy, adjust the approach accordingly, but since it's a general inquiry, focus on authoritative sources.