What happened
Nazi state officials gathered in Berlin's Wannsee district to coordinate deportation, jurisdiction, and administrative cooperation for the murder of European Jews.
Why it matters
The conference is a key marker of how genocidal violence operated through modern bureaucratic coordination as well as military conquest. It belongs in the timeline because World War II was also a war of occupation, racial empire, and industrialized mass murder.
Notes
Keep at least one explicit genocide anchor in the core World War II sequence.