In August, the Shoshone were accused of killing two prospectors in an ambush at Pearsall Creek, five miles from Cascade.

Heading the campaign against the Sheepeaters was Troop G of the 1st Cavalry, led by Captain Reuben Bernard; Company C and a detachment of Company K from the 2nd Infantry Regiment under the command of First Lieutenant Henry Catley; and 20 Indian scouts commanded by Lieutenant Edward Farrow of the 21st Infantry.

By August 20, a Sheepeater raiding party of ten to fifteen Indians attacked the troops as they guarded a pack train at Soldier Bar on Big Creek.

Those who defended the pack train included Corporal Charles B. Hardin along with six troopers and the chief packer, James Barnes.

By October, the campaign ended once Lieutenants W.C. Brown and Edward S. Farrow, along with a group of twenty Umatilla scouts, negotiated the surrender of the Sheepeaters.