Richthofen’s War by Avalon Hill, 1972.
I have that one, plus 1776
30 posts before Avalon Hill games mentioned?
If bro-in-law have only a few hours, AH’s Gettysburg is good fun, if we have more time the very detailed Devils Den or Bull Run might happen.
But the non-hex games they put out, specifically the game about Arnhem (Bridge too far) is my fav of all. 2 players can have opposing forces in the same zone simultaneously.
-PJ