Published in Strategy & Tactics magazine#19.
(from the rulebook:)
"This BLITZKRIEG revision was designed by James F. Dunnigan (who has never played this game) and put into an understandable format by Redmond Simonsen (who has played the game frequently). Mr. Dunnigan’s ideas and Mr. Simonsen’s organizational talents) became so intermingled by the time the project was finished that it would probably be best to say that they both did it. Forget about splitting hairs and leave it at that. For more on where all this fusion of talent will lead see the last paragraph in IF LOOKS COULD KILL DEPARTMENT.”
The Blitzkrieg Module System (BMS) is 1969 rules set for modifying Avalon Hill’s Blitzkrieg game. Rules included changes to the Sequence of Play, Zones of Control, Combat Results, Stacking, Railroads, Order of Battles, Production, Supply, Naval Forces, Air Forces, Flak, Weather, Guerillas, Artillery, Scenarios & Victory Conditions, and Minor Country Armies.