(Hwy 167 and Wolf Run Dr. Richfield, WI) November 9, 2021, 8:25pm. Black Triangle shape 300 feet wide 20 feet thick. Seen at 100 foot altitude viewed from 200 feet away traveling 10 miles per hour south east for 3 minutes. White lights on each corner pointed down with car light low beam intensity. On top, each corner had white blinking "aviation" lights. The craft was all black. Sides were flat and seams could be seen like sheets of sheet metal. An industrial electric motor type hum could be heard. There were multiple witnesses. To me, the vehicle appeared to be a United States military TR-3B craft. Video was taken but of poor quality. The audio was good.