I remember buying this Milton Bradly Tank Battle board game as a kid at a garage sale for probably a dollar back in the early 80s. I never figured out how to play the game. But I loved playing with the little tanks. Each one is about an inch and a half long. Sturdy plastic with moving turrets.
The instructions are included in this set which I grabbed off Ebay for under $10. I probably still won't read the instructions and just move the little tanks around.