Sand Creek Massacre National Historic Site References Sand Creek Massacre National Historic Site historic site, Colorado, United States Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Sand Creek MassacreSand Creek Massacre National Historic Site was opened in 2007 to preserve the location of the incident. Read MoreSand Creek Massacre National Historic Site was opened in 2007 to preserve the location of the incident. Read More