The beauty of 6mm miniatures is that you can pack a whole lot of them in to a small space, and create units that are actually close in number to their historical counterparts. Below are Adler Miniatures Continental Soldiers, in this case the majority of the 1st Maryland Regiment for the Southern Campaign. They don't have as much detail as the larger scales of course, but there is plenty to keep the painter busy and to please the eye at close range.
For realism I've included a fair amount of variation in "uniforms," a word that has to be used pretty loosely for the Continental Army. Some soldiers have mismatched outfits, some are completely out of uniform.
I also have not yet done much work at all on the bases, just giving them a simple coat of green as a temporary measure. I need a few thousand more of these, so the full base treatment will have to wait a while.
In addition to the march pose Adler offers two others for infantry: firing figures and advancing figures.