There are 5.1 million American Indians and Alaska Natives in the U.S. as of 2011, significantly fewer than the country’s 45 million black Americans (as of 2013). But like black Americans, indigenous people are killed by law enforcement officers at rates that far outstrip their share of the population.

While #BlackLivesMatter evolved into a national rallying cry for racial justice over the summer, a largely overlooked #NativeLivesMatter movement has been quietly galvanizing activists as well. Few mainstream outlets report on it, but the indigenous blogosphere and Twitterverse abound with horror stories, not the least of which is that six Native men and women were killed by police in November and December alone.