Respuesta :
Answer: There's a few causes.
Explanation: Lots of things cause a war, especially on this scale. The rise of militarism in Germany (invading Poland in 1939) and Japan (invading China in 1937). The result? Wars are mixed up. It is also worth noting the Versailles Treaty blames the Germans for WW1 which punished Germany harshly which is a reason why many turned to Hitler. Fascism also plays a part in this, and the propaganda against Jews is also quite interesting to see.
I've only grazed on this topic so here's some links:
https://encyclopedia.ushmm.org/content/en/article/nazi-propaganda (Nazi propaganda)
https://www.nationalgeographic.com/culture/article/treaty-versailles-ended-wwi-started-wwii#:~:text=Known%20as%20the%20Treaty%20of,every%20nation%20that%20signed%20it. (Versailles Treaty you may have to enter your e-mail)
https://www.history.com/topics/world-war-ii (General causes of WWII)
https://www.nationalgeographic.com/history/article/world-war-2-propaganda-history-books (American propaganda)
It's important to know that WWII was not started by just one country, there's probably a LOT more information out there so use this as a guide only please! :>