What are halfbreeds in history?

Answer 1

Halfbreeds were people of mixed race. During 19th Century, this term usually referred to someone who had Indian parent or grandparent. [Half-breed is also a political term used during the Progressive era.] Mulatto is a person of mixed black and white ancestry or the offspring of one white parent and one black parent. You will see this referenced in some US Census records from the 1880's.