Back in the mid to late 'eighties, I used to play Ultramodern 6mm games. One of the companies responsible for the rules I used was Tabletop Games, especially those rules written by the late Bruce Rea-Taylor.
First up is actually a set of rules designed for 20mm scale games (based on a ground scale of 1cm = 1 metre). It includes organisations for British, American and Soviet forces.
Challenger (and the later Challenger II) rules were for 6mm and 10mm games with infantry based as half section (Challenger) or full section (Challenger II). Challenger was published in 1983, Challenger II in 1988
There is a whole range of supplements for these (and the War-games Research Group).
The Digest series added additional forces from various theatres. Digests four and five were published after Mr Rea-Taylor's death and cover forces for Challenger II.
There was a scenario book, with a mix of historical and fictional scenarios.
A more detailed look at these books will follow.
Another set of rules from that period are Games Designer Workshop rules Combined Arms.
Those rules were at a larger scale, each vehicle/stand representing a platoon.
One of the most important fact/fiction books was The Third World War. This is the inspiration for Harold Coyle's Team Yankee novel.
