D the middle ages is the answer.
Khan's armies may have slaughtered more people than Joseph Stalin and Adolf Hitler's combined. His military campaigns sometimes involved eliminating an entire civilian population. As many as 40 million people were killed under his rule.
The Supreme Court affirmed the conviction of Charles schenck and Elizabeth Baer
Answer:
These countries were involved because they all began to push for autonomy during the conflict, becoming independent states afterwards.
Explanation:
Found this in my history textbook. Hope this helps.
