Tacforce is a game that was published in1980 under the dual banner of GHQ and GDW though the rules were designed and written by Frank Chadwick lending more weight to the GDW side with regulars like Marc Miller, Loren Wiseman, and Greg Novak along for the ride. The rules have a current incarnation as Tac II. The rules cover then contemporary tactical land combat with 1/285 miniatures.
The 3 book format was still in use. The rules seem reminiscent of the other 3 book tactical combat series of the moment written by Chadwick, Striker for the RPG Traveller.i
As a quick aid, information on vehicles and weapons is carried on a series of cards. Organizational material necessary to approaching the scenarios is included in book3, the scenarios and advanced rules are foundin book 2, and basic rules in book 1.
There is also a banal set of counters, and some charts and organizational sheets.
Scale is 1 to 1 for vehicles and guns. Infantry units represent squads or fireteams. A turn represents a minute of actual time. An inch is 50 meters. A turn consists of a movement phase and fire phase, first for Soviet forces, then for the US. Morale is effected by fire. Close assault also occurs as a portion of the fire phase.
As with so many GDW rules sets, rules appear in the oddest places. The rules for basing for example appear on the very last page of book 3.