West central Minnesota sees history on the move at 35 miles per hour The Military Vehicles Preservation Association rolled through the region Thursday on the old Yellowstone Trail with a convoy of 35 military vehicles. The convoy is on the way to conventions in Indiana and Ohio. 5:37 pm, Jul. 29, 2021 × A 35-vehicle convoy of military vehicles put history on the move. The Military Vehicle Preservation Association is following the old Yellowstone Trail from Aberdeen, South Dakota, to Ohio for a national convention. On Thursday, July 29, 2021, the convoy made its way through Appleton, Montevideo, Granite Falls, Sacred Heart, Renville and Olivia in western Minnesota on the way to Hutchinson to complete the day. Here, the convoy turns onto U.S. Highway 212 on the east end of Sacred Heart.