COD provides blanket coverage to the Western Front of 1939–1941, including French and British infantry, vehicles and ordnance (most tanks and guns being palpably less powerful than the late-war equipment in the previous gamette, giving an interesting feel to the scenarios) as well as infantry for Finland - elite troops who had the rare ability to rally themselves without the presence of a leader - and the "Allied Minors" including Belgium, Norway, Poland and the Netherlands. Like COI, a complete order of battle of British and French armor and ordnance is included, though American built vehicles in British service are not included (which was consistent with the pre-1942 timeframe of the gamette). Whereas COI expands the armor and artillery rules, COD gives more nuanced rules regarding the infantry and other foot soldiers, including such things as cowering and pinning, while introducing Scouts and morale disadvantages for early war infantry facing off against tanks. Additionally, many new terrain types are introduced on the two new mapboards, including marsh, river, large bridges, and orchards, as well as no less than three kinds of boats to cross a river with - Scenario 27 covers the crossing of the Meuse at Dinant by parts of the German 7th Panzer Division, with a highly-rated leader counter deemed to represent Erwin Rommel himself taking personal command.