As some of you may be aware, there is a movie called The Last Full Measure -- I looked on the internet for one based on the Shaara book and found it. I forget what it was about, but it wasn't Lee, Grant, and co.
The post-Gettysburg "era" is my favorite part of the war. It's where the South was really called on to give it's best as Grant, Sherman, and Sheridan bore down hard on us. Such men as J B Gordon, Fitzhugh Lee, Cleburne, J S Mosby and others came to the fore and proved they could carry the load as Jackson, Stuart, Ashby and others had before them. On the Northern side, you see better generalship, too -- the three names above, for example, as well as many others. Grant's Overland campaign, Petersburg, and the race to Appomattox changed how units (on both sides) saw themselves and made them dig a little deeper to determine why they were there and get real pride in themselves. It changed the US military and changed war.