Newbies start here with a classic free print-and-play intro to hex & counter wargames
Designer: Frank Chadwick
Artist: James B. Byrne
Publisher: (Web published), DTI (Diverse Talents, Incorporated), Game Designers' Workshop, Kokusai-Tsushin Co., Ltd. (国際通信社)
Free, relatively simple WW2 wargame.
The basic game lasts 7 turns by each side; the expanded rules set doubles that.
Many of the elements of wargames are presented here: zones of control, combat results table, movement and combat values, full strength versus half strength, terrain effects on movement and combat, turns divided into phases, and weather conditions for mud.
A web-based version of the game also exists at https://oberlabs.com/b4m/