Why does Shad show Jethro a map of western Confederate territory? Chapter 3-4

This is for Jethro to follow so that he can picture the places mentioned as the news of the war trickles in. Shadrach gives Jethro a thorough accounting of areas of strength and weakness to both sides, during which he is also teaching the young boy the proper use of grammar - throwing in a lesson on respect such as the use of 'Mr.' when referring to Abe Lincoln.