Chivington refers to John Chivington, a controversial figure in American history known for his role as a Union Army officer during the American Civil War. He is most infamously associated with the Sand Creek Massacre of 1864, where his troops attacked a peaceful camp of Cheyenne and Arapaho people in Colorado, resulting in the deaths of many, including women and children. This event has been widely condemned and is seen as a significant example of the violent conflicts between the U.S. government and Native American tribes. Chivington's actions at Sand Creek led to widespread outrage and condemnation, both at the time and in subsequent historical analyses. Following the massacre, he faced criticism from various quarters, including fellow military officers and politicians. The incident has had lasting implications for the relationship between the U.S. government and Native American communities, highlighting the tragic consequences of westward expansion and military aggression during the 19th century.