Winter War

The Soviet foreign minister, Vyacheslav Molotov, saying farewell to his German counterpart, Joachim von Ribbentrop (right), after a visit to Berlin during the Nazi-Soviet alliance that lasted from 1939 to 1941.

This pact between Hitler and Stalin paved the way for WWII

Conflict

Seventy-five years ago this week, the world was turned upside down when Hitler and Stalin signed a pact of alliance. Within days Hitler invaded Poland, starting World War II. Roger Moorhouse, a historian, has a new book out on the momentous but often-forgotten “Devils’ Alliance.”

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