Historians are experts who … a. Examine objects of the past that they have dug up.
b. Study natural feature of the earth such as landforms.
c. Study the development and culture of early humans
d. Record the past by analyzing written records

A historian is a person who studies and writes about the past and is regarded as an authority on it. Historians are concerned with the continuous, methodical narrative and research of past events as relating to the human race; as well as the study of all history in time.

the roman army grew in size and became dominant in the mediterranean region.