The Havana Conference of 1946 was a historic meeting of United States organized crime leaders. Arranged by Charles "Lucky" Luciano, the conference was held to discuss important mob policies, rules, and business interests.

The conference was held during the week of December 22, 1946 at the Hotel Nacional. This meeting is considered to have been the most important mob summit since the Atlantic City Conference of 1929. Decisions made in Havana resonated throughout the US crime families for the ensuing decades.

https://www.youtube.com/watch?v=LGUQXrV6Gdc