My father in law fought in the Warsaw uprising, while the Soviets stopped their offensive to let Hitler annihilate it, then he fought in Italy with the Anders army helping to liberate the west, then he came back to Warsaw to suffer the humiliation and suffering of life under a foreign domination and communism. This happened because the US and UK have traded their serious land war effort with the the Soviets in exchange for the domination over Eastern Europe. The US and British part in the war was important, but far less than people think. What is worst, the Soviets, who have actually won the World War II, did it because the Stalinist terror gave them no other choice, and as the reward, most of the victorious Soviet army officials have either been shot or deported to gulags right after the victory parade in the red square. If you want to understand something about this war, read this book:
http://www.amazon.co.uk/Europe-War-1939-1945-Simple-Victory/dp/0333692853