Answer: allusion
Explanation: because here Hemingway is alluding, or making a reference to Marius, who was a Roman general and statesman.
Answer:what that's impossible
Explanation:
I would say that they were called Pre-Columbians
Answer: Using comparisons can give the reader a broader picture on what is being compared.
For example, if you were to say the dog walked as slow as a turtle, this would give the reader more of a vivid idea on how the dog walks as opposed to saying the dog walks really slow.