Answer: I would guess West Virginia.
Explanation: Missouri and Kentucky were both confederate states and had slavery. West Virginia originally was a slave stat, but then became a part of the union later on. Hopefully this helps.
Hitler's rise was much more clearly connected to WWI.Then The Treaty of Versailles had punished Germany harshly. WWI contributed to the rise of dictatorship, then, because it caused some countries to be unhappy with the world order that came out of the war.
hope it helps
I might be wrong but I'm trying. Italy had this something called the Congress of Vienna and the end of Napoleonic rule in 1871.