On Sept. 1, 1939, 70 years ago, the German Army crossed the Polish frontier. On Sept. 3, Britain declared war.

Six years later, 50 million Christians and Jews had perished. Britain was broken and bankrupt, Germany a smoldering ruin. Europe had served as the site of the most murderous combat known to man, and civilians had suffered worse horrors than the soldiers.

By May 1945, Red Army hordes occupied all the great capitals of Central Europe: Vienna, Prague, Budapest, Berlin. A hundred million Christians were under the heel of the most barbarous tyranny in history: the Bolshevik regime of the greatest terrorist of them all, Joseph Stalin.

What cause could justify such sacrifices?

The German-Polish war had come out of a quarrel over a town the size of Ocean City, Md., in summer. Danzig, 95 percent German, had been severed from Germany at Versailles in violation of Woodrow Wilson's principle of self-determination. Even British leaders thought Danzig should be returned.

Why did Warsaw not negotiate with Berlin, which was hinting at an offer of compensatory territory in Slovakia? Because the Poles had a war guarantee from Britain that, should Germany attack, Britain and her empire would come to Poland's rescue.

But why would Britain hand an unsolicited war guarantee to a junta of Polish colonels, giving them the power to drag Britain into a second war with the most powerful nation in Europe?

Was Danzig worth a war? Unlike the 7 million Hong Kongese whom the British surrendered to Beijing, who didn't want to go, the Danzigers were clamoring to return to Germany.

Comes the response: The war guarantee was not about Danzig, or even about Poland. It was about the moral and strategic imperative "to stop Hitler" after he showed, by tearing up the Munich pact and Czechoslovakia with it, that he was out to conquer the world. And this Nazi beast could not be allowed to do that.

If true, a fair point. Americans, after all, were prepared to use atom bombs to keep the Red Army from the Channel. But where is the evidence that Adolf Hitler, whose victims as of March 1939 were a fraction of Gen. Pinochet's, or Fidel Castro's, was out to conquer the world?

After Munich in 1938, Czechoslovakia did indeed crumble and come apart. Yet consider what became of its parts.

The Sudeten Germans were returned to German rule, as they wished. Poland had annexed the tiny disputed region of Teschen, where thousands of Poles lived. Hungary's ancestral lands in the south of Slovakia had been returned to her. The Slovaks had their full independence guaranteed by Germany. As for the Czechs, they came to Berlin for the same deal as the Slovaks, but Hitler insisted they accept a protectorate.

Now one may despise what was done, but how did this partition of Czechoslovakia manifest a Hitlerian drive for world conquest?

Comes the reply: If Britain had not given the war guarantee and gone to war, after Czechoslovakia would have come Poland's turn, then Russia's, then France's, then Britain's, then the United States.

We would all be speaking German now. Continued...