The Napoleonic box scores
Can you picture the task I had on my hands when I was issued this page as a first-round proofer at Distributed Proofreaders? It comes from Issue 60 of the venerable Atlantic Monthly magazine, back in October 1862 when rebellion was much on the public mind. Check out those massive casualty rates in the second table, coming close to 40% of men in some battles! I hope there are memorials to those lost somewhere in each belligerent nation.
(The table renders excessively ugly when I put it between <pre> tags, so I'm just linking it as text here.)
If you see a mistake, I suggest you sign up at DP and get yourself set up as a second-round proofer or a post-proofer if you haven't done so already, so you can issue the correction yourself.
Update: Here is how it came out.
Suggested reading: Ship of the Line, a Horatio Hornblower novel.