D-Day (Smithsonian Edition) is a re-designed, simplified version of the original 'classic' Avalon Hill D-Day- which had two versions as well: D-Day (1961) and D-Day (1977). It is one of The Avalon Hill Game Co's game in their Smithsonian Series. Two scenarios, one historical and one "what if", are covered by basic and optional rules. A complete historical background and list of weapons, tanks, and aircraft is included.