Where are unanswered questions about World War 2?

Unanswered questions about World War II persist in various areas, including the motivations and decision-making processes of key leaders, the full extent of war crimes, and the impact of espionage and intelligence operations. Additionally, the consequences of the war on post-war geopolitics and the long-term effects on nations involved remain subjects of debate. Historians continue to explore the complexities of alliances, resistance movements, and the role of technology in shaping the conflict's outcome. These unresolved aspects invite ongoing research and discussion.