Answer:
Southerners otherwise known as the Northern Song Dynasty.
Explanation:
They committed late to the Mongolian empire so they are lowest in class.
I believe it was the Rhine or something close to that, where they had mined iron. I could be wrong though, good luck.
The German-Soviet Non-Aggression Pact of 1939 was the name of the pact that Hitler and some other people signed.
Germany and the soviet union!
