During this decade, Roman Nose and his fellow Dog Soldiers planned an attack against Captain Nicholas J. O'Brien in the Battle (-5[1])of Julesburg. The Battles of Stony (-5[1])Lake and Wood Lake occurred during a war in this decade in which Alexander Ramsey faced off against Shakopee (15[1])and Big Eagle. During this decade, the largest penal mass execution (15[1])in U.S. (15[1])history (15[1])included the (15[1])deaths of (*) 38 American (-5[1])Indians who were hanged (10[1])at Mankato. (10[1])The (-5[1])Treaty of Fort Laramie concluded a war (-5[1])in this decade (10[1])named for Oglala Lakota chief Red Cloud. (10[1])In this (10[1])decade, the (10[1])Dakota War occurred (10[1])at (10[3])the same time as (10[1])a (-5[1])war in (10[1])which the Chickasaw and Choctaw fought in the Battles of Perryville and Pea (10[2])Ridge. Dozens of Cheyenne and Arapaho were killed (10[2])in (10[1]0[1])the Sand Creek Massacre during, (-5[1])for 10 points, what decade during which some Sioux fought in the Civil War? (10[1])■END■ (10[1])