The Thirties were marked by confrontation and violence. The Western diplomats practicing Appeasement believed it would prevent another global war, but were woefully unaware of what they were dealing with. Most of the confrontation was between the ideologies of Nazism and Communism; they became mortal enemies in the thirties, which made their non-aggression pact and the dismemberment of Poland all the more shocking. At the end of the decade, the Nazi-Soviet Nonaggression Pact would shock the world and lay the groundwork for the Invasion of Poland and the Second World War.
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 savior of Germany.
The Japanese were initially 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.