Then i am not so happy at all.
I prefer them fighting at the side of Wellingtons Army, covering his flank and stopping the French advance.
Have to wait till it's 1814 and the battle of Quatre Bras where we can show how well an army we are.
It may please you to know that the Franco-Dutch alliance is tenuous at best and France always seems to attack them after a while. With the player's intervention, the French might just be beaten back.
Mikeyo, that's a solid idea to consider in the future, but right now joining an army is more or less the same as vanilla, except with ranks. One difference is that you can join normally (i.e. you require a certain amount of renown/centres) as an officer or you can join as a private (with no requirements).
Anyway, someone wanted map pictures?