Why did the Soviets help Germany invade Poland in WW2?

In 1939 Hitler signed a 'Non-Aggression Pact' with the Soviet Union. In that same year Hitler's troops invaded Poland on September 3rd. Stalin was told about the planned invasion and Hitler suggested that he send his troops in from the east on the same day, but they didn't mobilise until a week later.

This also meant that Britain, which had declared war on Germany on September 4th, was also at war with the Soviet Union, although no mention was made of this at the time. In 1941 Hitler reneged on the treaty he had signed with the Soviet Union and launched Operation Barbarossa, the invasion of Russia. At the same time, Britain and the US declared the Soviet Union an ally.

Many Allied merchant ships took part in the Murmansk Convoys, sending supplies through the bitterly cold Russian winter. Hitler's campaign in Russia turned out to be a disaster. His troops were not prepared for the harsh Russian winter.

It was so cold that e.g. the fuel froze in their vehicles, while the Russians had put addatives in their fuel to stop it freezing. The Russians were better supplied and better able to fight in the extreme cold. The turning point was the Battle of Stalingrad, where the Russians held out against the Germans and managed to turn them back.

In the spring of 1945 the Soviet troops reached Berlin and occupied the city (or what was left of it after intensive Allied bombing). Hitler and several other leading Nazis e.g. Goebbels committed suicide. The war had cost the lives of around 2 million Germans and 20 million Russians.

Fascism in Nazi Germany and Communism in Soviet Russia: same totalitarianism governmental ideal, just different ways of expressing their ideology. Both Hitler and Stalin were megalomaniacs, and both saw their ideologies as the ultimate ideology, which fuelled their drives to expand their empires.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.