First Battle is Real War Game Simulation created by the US Army, Fort Leavenworth, Kansas, USA. this version is 75 pages in total; 53 pages of Rules; 13 pages of Tally Sheets; etc.
The military units are meant to represented by user created, folded tent cards, with a military symbol on one side. In the "Open-Mode" configuration of this simulation each Team has a wall-mounted 1:50k planning map and the Simulation is played out on a table-mounted 1:25k map, divided into 2x3' sectors (roughly 10ft. across and 12ft. between the Divisional commanders). Each side has 3 Div. Commanders; 3 Artillery Commanders, 2 Operational Leaders; an Overall Commander; and an Operational Aide (22 people in total). To run the run the "Closed-Mode" a total of 55+ people are required. In the "Closed" version the Commanders are in a separate room from the Simulation and have status updates conveyed by written notes of brief, one-way, phone messages. HO scale miniatures (Roco) are typically used in the "Closed" version, so that limited "Aerial" photos (or sketches) can be requested. Combat is resolved through Dice-Rolling in a fashion similar to most commercial wargames of the era.
This is obviously more than your typical war-game, but it is a streamlined version of actual military simulations used by the US Army in the 1970's.
—user summary