Workers and Peasants Supplement (2010) - What is East Front Deluxe

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If your box says Eastern Front, you have Eastern Front Deluxe. The only difference between the tank cover and the cavalry cover being the box itself. 

EFD included the majority of the content of the original "Panzer Grenadier", which was semi officially referred to as "Eastern Front" once the series became a series, hence the name.