Answer:
Ethnic conflict involves fighting so military intervention can be nedeed
Rome was the first to have a government style called a Republic that is not quite Democracy but was very similar and gave the basis for many of the government styles we have today such as the United States government. Most modern countries are democratic republics such as the United States. There was an era in Roman time that is the first example of the Republic style of government we know as normal today.
One word that could describe Julius Ceasar (although it's very hard to pick just one) could be "firm". Although Caesar was in many ways far, he did not tolerate weakness.
Answer: Aegean Sea
Explanation: Greek civilization first settled near the Aegean sea. So it will be Greek civilization began along the Aegean Sea.