Which nations was stalin given control over ? ( 4 of them )

Im not sure if this is correct but here i go

1. Eastern Europe (Poland, Czechoslovakia etc.)
2. North Korea (They ere liberated by the Soviets during WW2 from the Japanese)
3. East Germany and East Berlin (They were split up after WW2) 
4. They also occupated parts of Japan to help them rebuild

i hope this helps

River valleys were good places for hunting and fishing.