Reminded me of this Jan. 2018 NYTimes article which addressed some more rarely told history; simple narratives often get history and ancestry very wrong: 

Indian Slavery Once Thrived in New Mexico. Latinos Are Finding Family Ties to It.

By Simon Romero @ NYTimes.com, Jan. 28, 2018

ALBUQUERQUE — Lenny Trujillo made a startling discovery when he began researching his descent from one of New Mexico’s pioneering Hispanic families: One of his ancestors was a slave.

“I didn’t know about New Mexico’s slave trade, so I was just stunned,” said Mr. Trujillo, 66, a retired postal worker who lives in Los Angeles. “Then I discovered how slavery was a defining feature of my family’s history.”

Mr. Trujillo is one of many Latinos who are finding ancestral connections to a flourishing slave trade on the blood-soaked frontier now known as the American Southwest. Their captive forebears were Native Americans — slaves frequently known as Genízaros (pronounced heh-NEE-sah-ros) who were sold to Hispanic families when the region was under Spanish control from the 16th to 19th centuries. Many Indian slaves remained in bondage when Mexico and later the United States governed New Mexico.

The revelations have prompted some painful personal reckonings over identity and heritage. But they have also fueled a larger, politically charged debate on what it means to be Hispanic and Native American.

[....]

“We’re discovering things that complicate the hell out of our history, demanding that we reject the myths we’ve been taught,” said Gregorio Gonzáles, 29, an anthropologist and self-described Genízaro who writes about the legacies of Indian enslavement.

Those legacies were born of a tortuous story of colonial conquest and forced assimilation.

New Mexico, which had the largest number of sedentary Indians north of central Mexico, emerged as a coveted domain for slavers almost as soon as the Spanish began settling here in the 16th century, according to Andrés Reséndez, a historian who details the trade in his 2016 book, “The Other Slavery.” Colonists initially took local Pueblo Indians as slaves, leading to an uprising in 1680 that temporarily pushed the Spanish out of New Mexico.

The trade then evolved to include not just Hispanic traffickers but horse-mounted Comanche and Ute warriors, who raided the settlements of Apache, Kiowa, Jumano, Pawnee and other peoples. They took captives, many of them children plucked from their homes, and sold them at auctions in village plazas.

The Spanish crown tried to prohibit slavery in its colonies, but traffickers often circumvented the ban by labeling their captives in parish records as criados, or servants. The trade endured even decades after the Mexican-American War, when the United States took control of much of the Southwest in the 1840s.

Seeking to strengthen the 13th Amendment, which abolished slavery in 1865, Congress passed the Peonage Act of 1867 after learning of propertied New Mexicans owning hundreds and perhaps thousands of Indian slaves, mainly Navajo women and children. But scholars say the measure, which specifically targeted New Mexico, did little for many slaves in the territory.

[....]

“I have Navajo, Chippewa, Greek and Spanish blood lines,” said Mr. Tórrez, who calls himself a mestizo, a term referring to mixed ancestry. “I can’t say I’m indigenous any more than I can say I’m Greek, but it’s both fascinating and disturbing to see how various cultures came together in New Mexico.”

Revelations about how Indian enslavement was a defining feature of colonial New Mexico can be unsettling for some in the state, where the authorities have often tried to perpetuate a narrative of relatively peaceful coexistence between Hispanics, Indians and Anglos, as non-Hispanic whites are generally called here.

[....]

Genízaros and their offspring sometimes escaped or served out their terms of service, then banded together to forge buffer settlements against Comanche raids. Offering insight into how Indian captives sought to escape their debased status, linguists trace the origins of the word Genízaro to the Ottoman Empire’s janissaries, the special soldier class of Christians from the Balkans who converted to Islam, and were sometimes referred to as slaves.

[....]

Pointing to the breadth of the Southwest’s slave trade, some historians have also documented how Hispanic settlers were captured and enslaved by Native American traffickers, and sometimes went on to embrace the cultures of their Comanche, Pueblo or Navajo masters.

Kim TallBear, an anthropologist at the University of Alberta, cautioned against using DNA testing alone to determine indigenous identity. She emphasized that such tests can point generally to Native ancestry somewhere in the Americas while failing to pinpoint specific tribal origins.

“There’s a conflation of race and tribe that’s infuriating, really,” said Ms. TallBear, a member of the Sisseton Wahpeton Oyate tribe of South Dakota who writes about tribal belonging and genetic testing. “I don’t think ancestry alone is sufficient to define someone as indigenous.”

The discovery of indigenous slave ancestry can be anything but straightforward, as Mr. Trujillo, the former postal worker, learned.

First, he found his connection to a Genízaro man in the village of Abiquiú. Delving further into 18th century baptismal records, he then found that his ancestor somehow broke away from forced servitude to purchase three slaves of his own.

“I was just blown away to find that I had a slaver and slaves in my family tree,” Mr. Trujillo said. “That level of complexity is too much for some people, but it’s part of the story of who I am.”

Lots more fascinating stuff in the article that I didn't quote, including cross-links, this is just a sampling.