Hitler's rise to power was through democratic means, but he and the Nazis paved the way in blood, targeting political opponents and Jews in violent attacks. Street battles were fought for the Nazis by their Brown Shirts. Eventually Hitler, with the support of the industrialists, was able to rehabilitate his reputation from bitter war veteran to saviour of Germany.
The Japanese were intially successful in their invasion of China, but as the new decade dawned, they held the cities while large Chinese formations harassed them from the interior. While China turned into a quagmire, Japan's military looked to the resources of the South Pacific and war with the Western powers.
The Spanish Civil War was a regional conflict that was turned into an international staging ground for the weapons of World War II. The Wehrmacht practiced air combat techniques and introduced tank manuver into the battlefield. Russian pilots gained some knowledge of German aircraft. The Spaniards gained a fascist dictator that ruled until his death in 1975.