Thanks for that Koppi, it's an interesting story. I'd not heard of Hartmann. If he arrived in North America in 1764, then he was just a bit late for the French & Indian War.
So many Palatines settled in Tryon County New York that there was a Palatine District. In Allan D. Foote's book
Liberty March, The Battle of Oriskany, I find John Adam Hartmann, from Fort Herkimer in the German Flatts district, listed as a private in the 4th Battalion, Kingsland and German Flatts District, of the Tryon County Militia. Hartmann survived the battle unwounded.
https://www.amazon.com/Liberty-March-Oriskany-Allan-Foote/dp/0925168726Oriskany has been given boardgame treatment at least twice.
Liberty March, also by Allan D Foote, had a limited publication nearly 20 years ago. A friend gave me a copy of the rules, but I don't have the board or counters. Maybe I'll find a complete copy some day:
https://boardgamegeek.com/boardgame/38265/liberty-marchMore recently, GMT's Newtown also includes an Oriskany game. I own it but haven't cut my copy yet.
https://boardgamegeek.com/boardgame/114530/newtownOriskany is, in my opinion, too big a battle to model using most flintlock era skirmish rules, but I've successfully staged it in 25mm using the rules
Our Moccasins Trickled Blood, which are designed to handle multiple players gaming a big frontier battle. I'm thinking about springing it on a new set of players down in Jim's Basement...
https://www.wargamevault.com/product/98833/Our-Moccasins-Trickled-Blood?term=our+moccasins&test_epoch=0