The Bear River Massacre, or the Engagement on the Bear River, or the Battle of Bear River, or Massacre at Boa Ogoi, took place in present-day Franklin County, Idaho, on January 29, 1863. After years of skirmishes and food raids on farms and ranches, the United States Army attacked a Shoshone encampment gathered at the confluence of the Bear River and Battle Creek in what was then southeastern Washington Territory, near the present-day city of Preston. Colonel Patrick Edward Connor led a detachment of California Volunteers as part of the Bear River Expedition against Shoshone tribal chief Bear Hunter. Hundreds of Shoshone men, women, and children were killed near their lodges; the number of Shoshone victims reported by local settlers was higher than that reported by soldiers.