The Polish campaign of 1939 is perhaps the most misunderstood and myth-filled aspect of all WW2 history. Many, if not most serious history books outside of Poland only give it a casual mention. Reducing it's importance to "the action that started the war", then moving on to the invasion of France. In reality, the campaign of 1939 is very complex and fascinating and quite worthy of deeper study. There are myths that seem to endure beyond all logic - Polish cavalry foolhardedly charging German tanks, or the Polish airforce being destroyed on the ground the first day for instance. The fact that it did not happen does not seem to diminish it's popularity even among some serious scholars. Yet, there is truth, maybe less flamboyant but very worthy of note and very complimentary of the Polish forces that often escapes mention. The Polish army fought hard and bravely in the face of nearly insurmountable difficulty. Despite this, they actually did check the German advance several times but were never able to hold against the overwhelming firepower and numbers that Germany was throwing at them. Germany had thrown nearly everything they could spare at Poland, leaving only a fraction of troops on the French border as they counted on France not reacting. Had France attacked in September as promised to Poland through treaty, the situation would have been much different. Eventually the Polish forces crumbled, but not before giving a good account of themselves. Even when the shooting was "officially" over, Polish underground forces sprung up almost immediately. Polish soldiers also fled in droves to Romania, Hungary, and elsewhere to eventually make it to France and the UK to continue the fight. By war's end Polish forces were so massive that they numbered the fourth largest Allied contingent. If you separate the British forces from their empire troops - Australians, Canadians, etc Poles came in third in sheer size, such was their fighting spirit. This is why we chose to portray soldiers who only seem to have had such a small role, yet contributed and sacrificed so much. There is a lot to learn and a lot to teach and explore.