On 10 May 1940 the German forces invaded the Netherlands, Belgium, and Luxembourg. On the same day the German Ambassadors handed to the Netherlands and Belgian Governments a memorandum alleging that the British and French Armies, with the consent of Belgium and Holland, were planning to march through those countries to attack the Ruhr, and justifying the invasion on these grounds. Germany, however, assured the Netherlands and Belgium that their integrity and their possessions would be respected. A similar memorandum was delivered to Luxembourg on the same date.
There is no evidence before the Tribunal to justify the contention that the Netherlands, Belgium, and Luxembourg were invaded by Germany because their occupation had been planned by England and France. British and French staffs had been cooperating in making certain plans for military operations in the Low Countries, but the purpose of this planning was to defend these countries in the event of a German attack.
The invasion of Belgium, Holland, and Luxembourg was entirely without justification.
It was carried out in pursuance of policies long considered and prepared, and was plainly an act of aggressive war. The resolve to invade was made without any other consideration than the advancement of the aggressive policies of Germany.
The Aggression against Yugoslavia and Greece
On 12 August 1939 Hitler had a conversation with Ciano and the Defendant Von Ribbentrop at Obersalzberg. He said then:
“Generally speaking, the best thing to happen would be for the neutrals to be liquidated one after the other. This process could be carried out more easily if on every occasion one partner of the Axis covered the other while it was dealing with the uncertain neutral. Italy might well regard Yugoslavia as a neutral of this kind.”
This observation was made only two months after Hitler had given assurances to Yugoslavia that he would regard her frontier as final and inviolable. On the occasion of the visit to Germany of the Prince Regent of Yugoslavia on 1 June 1939, Hitler had said in a public speech:
“The firmly established reliable relationship of Germany to Yugoslavia now that owing to historical events we have become neighbors with common boundaries fixed for all time, will not only guarantee lasting peace between our two peoples and countries, but can also represent an element of calm to our nerve-racked continent. This peace is the goal of all who are disposed to perform really constructive work.”
On 6 October 1939 Germany repeated these assurances to Yugoslavia, after Hitler and Von Ribbentrop had unsuccessfully tried to persuade Italy to enter the war on the side of Germany by attacking Yugoslavia. On 28 October 1940 Italy invaded Greece, but the military operations met with no success. In November Hitler wrote to Mussolini with regard to the invasion of Greece, and the extension of the war in the Balkans, and pointed out that no military operations could take place in the Balkans before the following March, and therefore Yugoslavia must if at all possible be won over by other means, and in other ways. But on 12 November 1940 Hitler issued a directive for the prosecution of the war, and it included the words: “The Balkans: The Commander-in-Chief of the Army will make preparations for occupying the Greek mainland north of the Aegean Sea, in case of need entering through Bulgaria.”