Corrected entry: In the beginning, a Civil War battle is taking place at the fictional St. David's field in 1863. The General who tends to Dunbar after the victory is a 3 star Lieutenant General. The only Yankee 3 star general during the Civil War was General Grant and he wasn't promoted to Lt. General until 1864.
Phixius
17th Feb 2011
Correction: I think the point of this mistake was to say this fictitious General would have outranked all the real-life Generals at the time with a rank not then in use, breaking the willing suspension of disbelief.