On September 1st., 1939, 1.8 million German troops invaded Poland on three fronts; East Prussia in the north, Germany in the west and Slovakia in the south. They had 2600 tanks against the Polish 180, and over 2000 aircraft against the Polish 420. Their "Blitzkrieg" tactics, coupled with their bombing of defenceless towns and refugees, had never been seen before and, at first, caught the Poles off-guard. By September 14th. Warsaw was surrounded. At this stage the poles reacted, holding off the Germans at Kutno and regrouping behind the Wisla (Vistula) and Bzura rivers. Although Britain and France declared war on September 3rd. the Poles received no help - yet it had been agreed that the Poles should fight a defensive campaign for only 2 weeks during which time the Allies could get their forces together and attack from the west.
There are many "myths" that surround the September Campaign; the fictional Polish cavalry charges against German tanks (actually reported by the Italian press and used as propaganda by the Germans), the alleged destruction of the Polish Air Force on the ground, or claims that Polish armour failed to achieve any success against the invaders. In reality, and despite the fact that Poland was only just beginning to modernise her armed forces and had been forced (by Britain and France) to delay mobilisation (which they claimed might be interpreted as aggressive behaviour) so that, at the time of invasion, only about one-third of her total potential manpower was mobilised, Polish forces ensured that the September campaign was no "walk-over". The Wehrmacht had so under-rated Polish anti-tank capabilities (the Polish-designed anti-tank gun was one of the best in the world at that time) that they had gone into action with white "balkankreuz", or crosses, prominently displayed in eight locations; these crosses made excellent aiming points for Polish gun-sights and forced the Germans to radically rethink their national insignia, initially overpainting them in yellow and then, for their later campaigns, adopting the modified "balkankreuz" similar to that used by the Luftwaffe. The recently-designed 7TP "czolg lekki", or light tank, the first in the world to be designed with a diesel engine, proved to be superior to German tanks of the same class (the PzKpfw I and II) inflicting serious damage to the German forces, limited only by the fact that they were not used in concentrated groups. They were absorbed by the Germans into their own Panzer divisions at the end of the campaign.
On September 17th. Soviet forces invaded from the east. Warsaw surrendered 2 weeks later, the garrison on the Hel peninsula surrendered on October 2nd., and the Polesie Defence group, after fighting on two fronts against both German and Soviet forces, surrendered on October 5th. The Poles had held on for twice as long as had been expected and had done more damage to the Germans than the combined British and French forces were to do in 1940. The Germans lost 50,000 men, 697 planes and 993 tanks and armoured cars.
Thousands of soldiers and civilians managed to escape to France and Britain whilst many more went "underground" . A government-in-exile was formed with Wladyslaw Raczkiewicz as President and General Wladyslaw Sikorski as Prime Minister.
