Germany prompted the United States to join World War I because of it's violation of the pledge for unrestricted submarine warfare in the North Atlantic Ocean and Mediterranean Sea, as well as enticing Mexico to turn against the United States. I hope this helps :)
1. Nomads whose herds of cattle provided their clothes and food
2. Warriors with bows and arrows who drove chariots into battle
Lack of expenses.
Let me know if that was right, and good luck!!!
USSR (Russia) was led by Stalin
