One major cause of the French Revolution was the "voting structure in the Estates-General, since this led to the disenfranchisement of many lower-class French people. Another cause was the American Revolution, however. <span />
The developed a bomb, not just that, the Nazis wanted to take over more land and that meant they where a threat to America, the Soviets teamed up with the US to create a bomb and it turns out the Nazis weren't even going to bomb them