Respuesta :

the primary events which led to the outbreak of World War II in Europe or German aggressive expansionary poliicies in Eastern Europe, primarily the invasion of Poland which triggered the outbreak a secondary cause of the reluctant of the other European powers to stop Germany aggression before it erupted into a full-blown War

The answers are "The rise of aggressive nationalism among some of the nations defeated in World War I." & "The rise of communism in Soviet Russia, which was seen as a threat by many Europeans nations."