This interactive battles and casualties map of the Civil War was created by the Washington Post. That’s a screen shot above; you’ll have to go to the site to play with it. The Post explains its features:
Press the play button below to watch the war unfold over time. Drag the scrubber or click on the months and years to change the date range. Roll over the circles for more information on each battle. Casualties are defined as killed, wounded, missing and captured.
IMAGE: Screen shot of Washington Post interactive graphic; created by Gene Thorp and published on April 12, 2011