There is still, to this day, an Iroquois presence in Wisconsin - a large group of Oneida ended up there at some point. My great grandfather, a Mohawk, actually lived there for a period as well... Our people waged war in every state east of the Mississippi river, in fact ;0)
Actually, I do know :-)) How? Well, I'm in Green Bay, and if you look at a map of the area and trace Hwy. 54 west out of Green Bay, you'll see a small dot--that dot is (ta da!) Oneida--which also is the HQ for the Oneida Tribe of Indians. The reservation boundaries actually encompass most of the west side of Green Bay, goes far west to almost the border of the next county west and south into the next county south, but there's the usual fight about where the boundaries actually are.
The Oneida Tribe of Indians is a force in this area--they own a casino, a Radisson hotel and conference center, a bank, restaurants, and a number of other holdings. If you see pictures of the new Lambeau Field, the Oneidas have a gate named after them (a fairly pricey deal, from what I understand, but not in the $100 mil naming rights price). And I have a number of friends and neighbors who work at the various Oneida Enterprises, some Oneida, others members of other tribes, and some non-Indian. A few of my college classmates are now higher-ups in the Tribal government. They're a very successful tribe. And if you ever get up this way, I know they'd love a visit.
Holy cow, my Grand Parents (great great, were Mohawk, hailing from up state New York. Lot's of Indian blood flowing in these veins.