Washington Post Civil War Map
I do like my history served up on a nice map. And this is a very nice map!
The Washington Post's Google Map of the Civil War maps all the battles and casualties of the American Civil War. The map features an animated time-line that allows you to watch the war unfold over time. You can pause the animation at any time and you can also refine the view to show any period of time.
If you roll over the circles you can view the date and the casualties of the mapped battle. If you click on the circle you can read a more detailed account of the battle. There were a lot of battles and a lot of casualties in the Civil War so obviously a lot of work has gone into creating this map!
A lot of effort and an awesome map.