So, tomorrow I am going to have my players get involved in leading the defense of their homeland against invading tribes. For this I have printed out a map of the lands and made a list of troops and resources at their disposal. They will either wind up being the commanders of the army or advisers to an NPC commander. So they will spend some time planning troop movements etc.

For the battles I intend to convert the armies into WFRP dice, so each major battle is boiled down to a single roll. 100 friendly warriors is a blue dice, 200 enemies is a purple dice, friendly elite units are an expertise dice, bows are conservative, horses are reckless, a large amount of inexperienced troops become misfortune etc

Has anyone else done anything like this with WFRP? Or with another ruleset for that matter. I have no experience running something like this so I am sure I am going to somehow mess up completely, but it will probably still be fun

Not sure with 3rd Edition.

But I remember reading a long time ago in second edition, people converting their chars to Fantasy Battle chars and running a Fantasy Battle session.

I actually made some rules some time ago for running something a bit like a fantasy battle type scenario when the players needed to defend their village from beastmen. It was an interesting culmination of a campaign, but a bit too tedious to repeat.

But for this I am going for more of an overarching campaign instead of concentrating on one particular battle. More like a group of generals gathered over a map of the land moving pieces that represent armies.

So it will be more like "The main force will travel down this road and head for the city by land. While they lay siege to it, a group of mounted warriors will skirt around it and take the villages south before heading east to establish contact with any resistance groups still alive. Meanwhile, another group will be sent north to the surviving fishing villages to help build and man ships that will then sail down and attack the city from the sea-side."

Hero's call specifically details this approach by representing groups with a die.

You could take a look at AD&D 2nd Ed "Birthright" Mass combat rules. It is Card and grid based system but it would allow for what I *think* you are after, a fast easy way to deal with mass combat. It would not be as fast as a single dice roll, but it would allow for your players to have a greater control of the action and deal with units in a single roll.