1859, which covers both the 1859 Second Italian War of Independence and the 1864 Second Schleswig War.
The rules were designed specifically for large-scale battles of several divisions to several corps on each side (ideally with 6, 10, and 15mm figures) but the rule system was subsequently modified to accommodate much smaller engagements (with larger size figures) as well.
Besides the rules, 80 percent of the book is devoted to detailed historical notes, background information, orders of battle, and an extensive annotated bibliography. Fourteen exhaustively-researched historical battle scenarios are included in each book; these cover seven Italian and seven Danish scenarios in "1859". Both books are extensively illustrated in color throughout, and contain ample diagrams and examples of play. Summary "cheat sheets" are included.