The rules hiding behind the following links are officialy published by Avalon Hill. They were found either in the Empires in Arms rulebook or in diverse issues of The General.
If rules were voided by the official Errata, additional (semi-official) or house rules, they are written in light grey colour. Official erratas are written in dark purple and additional rules in green colour.
If the game parties agreed in house rules they were marked by different icons depending on the game.