Claims that Poland started World War II are without foundation. These claims are perpetrated by misguided fools fuelled by sloppy historians, the "hands-off Russia" wets and Soviets with alterior motives. The Soviets invaded and brutally raped Poland while she lay mortally wounded.
This act of armed aggression was in violation of 7 international treaties, agreements and assurances, including the pact of non-aggression between the Soviet Union and Poland, signed in Moscow on July 25th, 1932 for a term of 3 years and subsequently extended until December 31st 1945 by a Protocol signed in Moscow on May 21st 1934.
Attempts to justify the invasion were made in all instances of such action, both by the Soviets, when they entered Finland, Estonia, Lithuania and Latvia and by the Germans in their attacks on Austria, Czechoslovakia, Poland, Norway, Belgium, Denmark, Holland, Yugoslavia and Greece.
Russia had a common plan with Germany to partition and destroy Poland as they had done with the Austrians for 123 years before the 2nd Republic.