http://en.wikipedia.org/wiki/Molotov-Ribbentrop_Pact
[snip] Helping Germany grow strong had accordingly been Soviet policy from 1920 to 1933. A fourth partition of Poland was suggested at regular intervals, satisfying Lenin’s imperative that Versailles be undermined by destroying Poland. Once Hitler renounced the military cooperation between Nazi Germany and Soviet Russia that Hans von Seeckt had arranged, Stalin adopted the Popular Front policy, trying to draw the Western powers into war with Germany. [end]
Note: this topic is from 5/21/2008. Thanks Free ThinkerNY.