Storm over Arnhem: The Crossing

Published in Vol. 19, Issue #1 of the Avalon Hill magazine "General".

This expansion/variant uses new units ALREADY supplied in the game but not used in the published scenarios.

From the intro article:

"This article is undoubtedly a first in wargame publication history. Never before, at least in our recollection, has a game been published with all the parts necessary for a variant style of play except the rules..."