Answer:
the cause of ww2 was that Hitler and stalin invaded Poland.This in turn was saw as itmidation to france and the british people.
Explanation:As hitler sought to get all the countries and provinces the German empire lost in ww1 he layed his eyes on certain countries that much countries at the time didnt care for such as provinces that were part of the austrian-hungarian empire since the German empire gave rise to thatempire.Though when Hitler invaded poland that was the last straw for frenchmen and britshmen and this was seen as an act of war.Hitler than showed his lightning war strategy which he didn't create which was Heinz Guderian whom actually created this strategy.As hitler invaded france The british people left at dunkirk along with belgian and french troops.