...The question is, who does the guy in the 18th century pink vest and britches represent...
He's a re-enactor belonging to a group that re-enacts a Prussian regiment from the Seven Years War. If you go back to the photo page, click the View All link, to see all of the pics in the gallery. Most of the pics are from a re-enactment.
There's a color from one of the fusilier regiments in picture 17, Regiment 39 "Brunswick-junior", but that's not the unit the fellow on the tank portrays. I'm checking through my books now; there are several Prussian regiments represented, as well as Freikorps and Jaeger.
The troops in white coats are Saxons, also representing a couple of different units.
There are some good shots of camp set-up, though as with many re-enactments, you have to be carefull to distinguish the authentic from the anachronisms. For example, the tents look about right, from contemporary illustrations. But the little camp stools some of the Prussians had are Ikea, I think.
There's a little map in the margin of the album page, and it looks like this took place outside Sagan, now Zagan, in Silesia in Poland, probably last weekend.
Thanks for the link!
Prost!
Brad