<P> The situation escalated with the Grattan affair in 1854, when a detachment of U.S. soldiers illegally entered a Sioux encampment to arrest those accused of stealing a cow, and in the process sparked a battle in which Chief Conquering Bear was killed . </P> <P> Despite the peace treaty of 1851, Hunkpapa Lakota chief Running Antelope killed four Arikaras in 1853 . </P> <P> Around the same year, a joint Cheyenne and Lakota war party found a big Crow camp in the valley of the Little Bighorn River . The Lakota One Bear killed a Crow woman taken captive by the Cheyennes . </P> <P> Around 1855, the Assiniboines and the Lakotas met on the battlefield more often than before . The Arikaras conquered horses from the Sioux at least in 1858, while war parties of Crows troubled Lakotas near the Upper Platte the same year . </P>

The treaty of fort laramie signed at the end of the great sioux war quizlet