Operation Backstab is a Polish-Czech battle plan, involving 850,000 troops to land an amphibious, D-Day-like invasion in Russian-occupied Lithuania and Latvia, and then attack the Russian forces from behind while the remaining forces attack from the front, making retreat or advance impossible unless the Russians push through the Polish forces. This is coupled by air raids on the front line to make a Russian airlift impossible without destroying the Polish Air Force to a point where it can not claim air superiority anymore. Then, the Polish soldiers will merge with Swedish soldiers, and progress continues as in Operation Polish Offensive.