The victory conditions for this board are NOT standard. If you read nothing else, read the following paragraph carefully:
The object of this game is to transfer at least 17 units from your "Reinforcements" territory to the "Victory" territory in the lower left hand legend. The only way to do this is to create a complete supply line from the top of the board to the VERY bottom of the board (or vice versa). Because the board allows you to transfer units to any connected spaces, you may use both of your two transfers to move those units into the "Victory" territory (the middle box of the legend. On your next turn you must deliver the coup de grace by attacking from the Victory box to your opponent's capital.
A few things to keep in mind: The "Victory" territory has a -16 per turn booby trap to keep you from moving units into that box before you have completed your supply line. You need to transfer 17 or more units to the middle box IN ONE TURN.
Rules
The territory bonus is 1 unit per 8 territories held with a minimum of 3 each turn.
Placement is DISABLED on territories that are not on a road. BUT, Off-road territories are stronger positions, they attack roads with a 7v5 sided dice advantage and defend from roads with a 5v6 sided dice advantage.
There are 6 attacks per turn.
Return to Attack is OFF - this makes it tricky to manage resources, but it is a requirement in order for the board to work properly.
Abandon is ON, with retention.
Prussian Reinforcements Scenario
The hexes that border the counter at the top right of the board do NOT fortify off the board and as such do not count for victory purposes.
The British start with a slightly inferior position and less armies. Beginning on the 10th turn, FIVE additional "Prussian" troops are added to the Red (British) reinforcements total for every turn until the end of the game. These units are added to the box in your right hand legend. There's a nifty-cool countdown clock on the board (Thanks for the suggestion, Andernut) so the suspense mounts as the moment draws near.
Helpful Hints
Make sure you start your supply-line from the bottom or top of the board (depending on which side you are on) early in the game so you can get to those reinforcements that are piling up in the reinforcements box in the bottom left hand legend. Once you have done this, you can reinforce them onto the board as you wish. Eventually you will use them to win the game by reinforcing them entirely through the board.
A number of players who have rated this board have included some great suggestions regarding tactical approaches for play. I hightly recommend reading these.
http://www.wargear.net/boards/view/Battle+of+Waterloo/Ratings