Unlike most of the Mormon emigrant trains of 1855 which outfitted at Mormon Grove just outside Atchison, Kansas Territory, the Oliver Peters Company started from Florence, Nebraska Territory; it was the last train to do so that season. Little is known about the itinerary of this party, but it was reportedly already on the North Platte River when soldiers under the command of General William S. Harney attacked a Brule Sioux village near Ash Hollow on September 3. Learning of the battle, Captain Peters assigned armed men as outriders to protect the company as it rushed on toward Fort Laramie. Failing to secure an army escort at the fort, the train pushed on until, at Sweetwater Creek, the Sioux attacked, forcing the travelers to fight for their lives from their encircled and barricaded wagons. The fight lasted until sundown; then the Indians withdrew, carrying off their dead. Three of the defenders had received mortal wounds and were buried that night. Next morning, the train pressed on in an effort leave Sioux territory by crossing the Continental Divide into friendly Shoshone country. The emigrants apparently succeeded in doing so without further incident. The train then visited Fort Supply and Fort Bridger before stopping at the Bear River to rest the animals and repair the damage caused by the Sioux attack. The train then passed through Echo Canyon and probably followed the usual route over Big and Little Mountains and down Emigration Canyon to reach Salt Lake City. The date of arrival is presently unknown.