The attack on Poland, as history records, proceeded smoothly and within the month devastated the country into complete submission. The Luftwaffe pounded the airfields destroying all Polish resistance by the fifth of September. At the same time mechanized troops of the German Armed Forces supported by tanks, rushed through the country side breaking the ill-equipped defenders. This ferocity brought all opposition to a stand-still making the subsequent soviet incursion merely the final nail in the coffin.
Needless to say Hitler was beside himself in joy not unexpected. From the beginning he had the utmost confidence in his fighting men, never wavering on the belief that they could handle the task at hand. While his generals were first doubtful even his detractors eventually came around.
Not all at once, of course. For Hitler still faced the usual threats imposed against a tyrant: assassination. Plotters in Germany as well as abroad were determined to kill Hitler, seeing him as a cancer on German society with his expansionist policy of racial purity. Throughout the Polish invasion, and upcoming hostilities, the Anti-Hitler group tried several times, in vain, to murder the Furher.
Unfortunately their attempts to do so failed. The result of their failure was the continued living of the man who would in short order give demands for the invasions of Denmark, Luxemburg, France, Sweden, and Norway. Conquering all he touched within the year Hitler and his staff were beyond reproach among the German populace. And while internationally he was quite condemned he still harbored feelings of possible appeasement with his Anglo-Saxon cousins. Unrealistic these feelings were they persisted for some time floating around as possible means of settling disputes with nations which he claimed to never want to fight in the first place.
While his claims about never wishing to dismantle the British Empire may have been true this did not stop him from issuing confusing war directives towards his generals; one moment he would rage against the English making hurried plans for their subjugation while the next he would give vent to his doubts concerning Operation: Sealion (the planned invasion of England).
Such wavering fighting spirit showed in diplomatic talks with his allies and the representatives of the conquered. Though he had won a great series of victories on the battlefield realpolitik wise he seemed more behind than ever: The English refused to submit, the Spanish beat around the bush trying their best to avoid entry into the war, and the French subserviently bowed to his personality while rejecting his pleas for entry into the fight against the British.
On top of this his Italian ally (Mussolini) had launched an invasion of Greece primarily to upset his own growing influence on the world stage. All of these events infuriated Hitler. In his mind all he wished was to unite Europe and destroy the decadence of Jewish Bolshevism. Why the other powers, many of whom should have shared his racial and political desires due to their lineage, have thus far rebuffed his offers of collision mystified him to no end.