Answer:
German takeover of Poland
Step-by-step explanation:
What action actually started the Second World War?
Answer - The reason why the second world war started is because of Hitler's conquering of Poland. since he conquered Poland it forced the great Britain and France to have a world war 2 (II).
What is a World war?
Answer - A world war is a really big conflict which includes either most of the world if not all of the world's power's.