This is the 4th Edition with vastly improved contents over previously released versions. There are many differences over the others, with numerous enhancements due to the efforts of these fine folks and countless others. The best way to see those is to visit the L2 Design Group's website or one of the others that feature this wonderful game. Some of the things that they've done for this is: enlarged the size of the game-board hexes; enlarged the game counters (to 5/8"); enhanced the visual aspects of the graphics; included New Scenarios; allowed for an 'Allied Expeditionary Force' (Variant Counters); provided a New Weather Chart; improved on everything in general; and even included a CD-Rom for game play with others over the 'Net! There should be no shortage of opponents for those dedicated to supreme Wargame play with this, and it's definitely worth the effort. You will benefit from acquiring a copy of it for the value alone. Those folks at L2 D.G. are planning on releasing even MORE of John Edwards' great game designs and I'll be looking forward to their expertise in producing them as well. Then, maybe, the rest of you folks can reap the pleasure of J.E.'s innovative systems & the improvements he makes to his competitors' games in his earlier releases as much as I have. The inspiration for Russia Besieged.