The battle that effectively turned the tide of the US Civil War took place 150 years ago. To mark this momentous occasion, On Point, is doing some wonderful radio programs on the battle, the people who fought in it, and its significance in American history. Check out their website for a full list of resources on the battle as well as links to listen to the program. It's fascinating and well worth the listen.
Also check out the Washington Post's article on Civil War reenactors for a fascinating look at the people who devote their free time to studying and keeping Civil War traditions alive. For more resources check out the National Park Service website that has a whole section devoted to the various 150th Civil War anniversary celebrations and events that are taking place nationwide.