Hans Und Panzer is a set of free wargames rules for WWII tank combat. The author writes:
Hans in Panzer is a game of tank combat in World War II. Using small scale soldiers and vehicles, you can recreate an entire battle on a coffee table. The rules accommodate tanks and equipment used by merican, German, British and Russian forces. The average space for a game would be 4” by 8” or so. Using these rules, you can even play on a coffee table. All you need are miniature soldiers, terrain pieces, measuring sticks and six-sided dice.