past perfect

hello

This is the same question but the contex is different

In the last years of the 19th century, a Young American Indian called Buffalo Child Long Lace was growing in North America. His tribe, the Blackfeet, lived in an area between Montana in the USA and Alberta in Canada; here they followed the buffalo, which they hunted for its skins and meat. Like all the boys in the tribe, Long Lance (3) (learnt to ride, hunt, fight and dance.

No white people (4) came to this remote part of North America until the 1880s – but when they did, the lives of the Blackfeet (5) (begin) to change greatly. Instead of hunting Buffalo,

In this case , will it be possible to use had come, I dont think so cause both expression means the same time (In the last years of the 19th century, until the 1880s) so , the author choose past continuous or past simple so the other verb is past simple
So am I right?

Thank you to let me know