Ever since collecting 6mm Heroics & Ros to fight Wilsons Creek at 1:10 (Featherstone has so much to answer for) back in 81, I can't get over that one. Raids on sleepy camps (possibly), a small flank (actually rear) attack that might shift balance but not the whole game. Bluffs, creeks, cornfields (all a must for the UK player - so exotic) and a single building (for those with limited terrain resources). It even has lancers, and not much artillery. It's not a huge battle and in consequence fits most gamers idea of a single table-top game.
I no longer collect ACW, no longer have a collection even but, if I did....
Sorry, showing my age and (probably) lack of ACW knowledge.