Improbably, the nation of Norway finds itself the front line of the Second World War.

In the final year before the war began, Winston Churchill's denunciations of Nazi Germany began to seem prescient, but Prime Minister Neville Chamberlain fiercely resisted calls to invite Churchill into the Cabinet until war came. Then Churchill became First Lord of the Admiralty, for the second time in his career.

Adolf Hitler wanted to attack in the west immediately after the fall of Poland, but unfavorable weather kept postponing the offensive. Then a copy of the plan fell into Allied hands.

With the other Great Powers involved in their own wars, Stalin and the USSR are now free to claim the territories Germany granted to their "sphere of influence."

When Germany invaded Poland in 1939, it freed the Nazis from having to worry about international opinion. Hitler and his followers could now do as they pleased.

With the narrative at the beginning of the Second World War, we pause to consider what lessons can be learned from the past twenty years.

Adolf Hitler believed that the leaders of France and Britain would be too cowardly to go to war to defend Poland, but even if they did, he was willing to take them on. Here we go again...

As Germany was ratcheting up the pressure against Poland, it and the USSR signed a non-aggression agreement. No one knew it at the time, but this agreement contained secret protocols that, among other things, divided Poland between them.

Electronic amplification allowed singers and musicians to perform in a softer, more intimate way. The new styles became very popular, especially in the USA.

By 1938, it was clear the Spanish Republic was in trouble. British and French efforts to maintain peace with Germany and Italy had the side effect eliminating whatever hope remained.