Hitler and Stalin invaded Poland and sparked World War 2.
Nazi Germany, when it invaded Poland.
their actions caused the start of World War 2....
The German invasion of Poland on 1st September 1939
World War 2
The German invasion of Poland on 1 September 1939.
Hitler invaded Poland.
world war Two was sparked by World War One the Treaty of Versailles was imposed on the Germans putting them in mass debt the Germans became inraged Hitler took advantage and World War Two begins
The Nazi Germans began by attacking Poland in September 1939 and Japan attacked the US in December of 1941. These sparked the European and Pacific Theaters of War in World War 2.
Hitler's actions were the most important.
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Archduke Franz Ferdinand had been assassinated 25 years before World War 2. His assassination sparked World War 1, not World War 2. No archdukes were assassinated during WWII.