Answer: C. required them to pay taxes to Rome
Explanation: Hope this helps!
He did so because he wanted revenge on France and England for winning the first war. He was a young soldier in the WWI and felt that Germany was shamed after the war. So he started the second to gain respect back and to prove that their country was also a great superpower. He believed in racial purification and wanted to take over Europe and remodel it the way he wanted.
It would be combat service in the army, according to the source from Native American source.net, some 10,000 Native American tribe members served in the military in WW1.