Friday marks 160 years since Colorado's Sand Creek Massacre, where U.S. soldiers attacked a camp of indigenous people, mostly women and children, killing hundreds.

It's been 160 years since the Sand Creek Massacre- when United States soldiers attacked Cheyenne and Arapaho people camped in southeastern Colorado. More than 200 innocent people mostly women, children and elders were killed.

"They need to know our story," said Chester Whiteman, a member of the Cheyenne and Arapaho Tribes of Oklahoma and tribal representative for NAGPRA and Sand Creek.

Ten years ago, Governor John Hickenlooper apologized to the descendants on behalf of Colorado. Today, there will be a vigil at the Capitol.