The Bear River Massacre: A detachment of California Volunteers led by Colonel Patrick Edward Connor engage the Shoshone at Bear River, Washington Territory, killing hundreds of men women and children.

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.