Two contemporaneous factors in Japan contributed both to the growing power of its military and chaos within its ranks leading up to the Second World War.
One was the Cabinet Law, which required the Imperial Japanese Army (IJA) and Imperial Japanese Navy (IJN) to nominate cabinet members before changes could be formed.
When the German Führer broke the promise he had made at that conference to respect that country's future territorial integrity in March 1939 by sending troops into Prague, its capital, breaking off Slovakia as a German client state, and absorbing the rest of it as the "Protectorate of Bohemia and Moravia", Britain and France tried to switch to a policy of deterrence.
As Nazi attentions turned towards resolving the "Polish Corridor Question" during the summer of 1939, Britain and France committed themselves to an alliance with Poland, threatening Germany with a two-front war.
The immediate cause was Germany invading Poland on September 1, 1939, and Britain and France declaring war on Germany on September 3, 1939.
Problems arose in Weimar Germany that experienced strong currents of revanchism after the Treaty of Versailles that concluded its defeat in World War I in 1918.
In Europe, Italy under Benito Mussolini sought to create a New Roman Empire based around the Mediterranean.
It invaded Albania in early 1938, at the start of the war, and later invaded Greece. This provoked angry words and an oil embargo from the League of Nations, which failed.
Under the Nazi regime, Germany began its own program of expansion, seeking to restore the "rightful" boundaries of historic Germany.
As a prelude toward these goals the Rhineland was remilitarized in March 1936.