While Poland had spent a high proportion of its revenues on the military during the 1930's, it was inevitably at a tremendous disadvantage compared to its bigger and industrialized (and very aggressive) neighbors, Germany and the Soviet Union. When those countries invaded Poland in 1939 the Polish artillery could only deploy a fraction of the guns put against her, many of which were of Great War vintage, and while the excellence of the crews meant they did great damage on the aggressors, the weight of numbers the Germans and Soviets could bring to bear meant the final result was predictable.