Brockton is a few miles south of the Twin Buttes, a famous landmark because of a battle between the Crow and Sioux Indians. It is believed that five Crow Indians stole about 150 horses from a Sioux camp and from Fort Kipp during the time the Fort was occupied by the U.S. Calvary. The Crows, intending to circle the Sioux, crossed the Big Muddy River, following it for 25 miles to Rocky Point, only to run right into the Sioux. All the Crows were massacred and the horses recaptured. The first post office was established in 1904 with Fred Anderson as postmaster.
Brockton is located in northeastern are of Montana, west of Culbertson on Highway 2.
