This field has evolved significantly over time, as perspectives on colonialism, the definitions of genocide, and the production of Indigenous histories have changed.
[1] American historian Ned Blackhawk said that nationalist historiographies have been forms of denial that erase the history of destruction of European colonial expansion.
[2] Historian Jeffrey Ostler says that in older historiography, key events in genocidal massacres in the context of U.S. Army missions to dominate Indian nations of the American West were narrated as battles.
Massacres, when they form part of a pattern targeting a national, ethnic, racial, or religious group, are frequently genocidal.
"Benjamin Madley performed a case study of the Modoc War, comparing details of death tolls in both sides in the conflict, to support this point.