Can you please answer this

What are the strengths of the byzantine empire?

How were the economies of the inca empire and ancient river valley civilizations such as egypt and phoenicia different?

What did president roosevelt do to aid panama in becoming an independent country? a. he negotiated a peace treaty with nicaragua to purchase the land. b. he invaded colombia to establish a us base for defense. c. he placed warships around panama to block sea lanes. d. he used dollar diplomacy to block imports to nicaragua.