So fucking what?

While most of the German army was engaged in Poland, a much smaller German force manned the Siegfried Line, their fortified defensive line along the French border. At the Maginot Line on the other side of the border, British and French troops stood facing them, but there were only some local, minor skirmishes, while in the air there were occasional dogfights between fighter planes. The Royal Air Force dropped propaganda leaflets on Germany and the first Canadian troops stepped ashore in Britain, while western Europe was under a period of uneasy calm for seven months.

Indeed, the sense of unreality was maintained when some British officers imported packs of foxhounds and beagles in 1939, but were thwarted by the French authorities in their attempts at introducing live foxes.[3] Civilian attitudes in Britain to their German foes were still not as intense as they were to become after the Blitz. In April 1940 a Heinkel bomber crashed at Clacton-on-Sea in Essex, killing its crew and people on the ground. They were all laid to rest in the local cemetery which was provided with support from the Royal Air Force. Wreaths with messages of sympathy for the casualties were displayed on the coffins.[4]

Meanwhile, the opposing nations clashed in the Norwegian Campaign. In their hurry to re-arm, Britain and France had both begun buying large amounts of weapons from manufacturers in the US at the outbreak of hostilities, thereby supplementing their own production. The non-belligerent US contributed to the Western Allies by discounted sales, and later, the lend-lease of military equipment and supplies.
People of Warsaw outside the British Embassy with a banner which says "Long live England!" just after the British declaration of war with Nazi Germany

Despite the relative calm on land, on the high seas the war was very real. Within a few hours of the declaration of war, the British liner SS Athenia was torpedoed off the Hebrides with the loss of 112 lives in what was to be the beginning of the long running Battle of the Atlantic. On 4 September, the Allies announced a blockade of Germany to prevent her importing food and raw materials to sustain her war effort, the Germans immediately declared a counter-blockade.

At the Nuremberg Trials, Alfred Jodl said that "if we did not collapse already in the year 1939 that was due only to the fact that during the Polish campaign, the approximately 110 French and British divisions in the West were held completely inactive against the 23 German divisions."[5]

General Siegfried Westphal stated ("World at War" - France Falls - Thames TV), that if the French had attacked in force in September 1939 the German army "could only have held out for one or two weeks".
http://en.wikipedia.org/wiki/Phoney_War